All Abrahamic religions believe in the return of the savior, the liberator of the human beings and redeemer, in the End-Time. Prophets and divine messengers have promised the day that the whole universe will be full of justice and tenderness. Other religions also have similar beliefs, although they differ in some minor aspects, which will be discussed below. We go through references from different religions and faiths to examine their views about the last savior. 

Kalki: The Last Savior in Hinduism

In Upanishads, which is a collection of ancient Sanskrit texts that contain some of the central philosophical concepts and ideas of Hinduism, the last savior is called Kalki. He is believed to be the tenth avatar of Hindu god Vishnu in the last of the four stages in the endless cycle of existence known as "Samsara," which is defined "as the endless cycle of birth, death, and rebirth. Or as the world of suffering and dissatisfaction (dukkha)" [1].  He rides a white horse with a fiery sword. He will end the darkest and destructive period to remove adharma [i] and will usher in the Satya Yuga [ii][2]. 

Another reference talks about a just commander at the end-time who is the leader of angels and humans, who knows the truth and gets hold of everything from deep in the seas too high in the mountains, and no one greater than him will come to earth [3].

Saoshyant: The Eschatological Savior in Zoroastrianism

In Zoroastrianism, there are three saviors who each will rise in a thousand years. The last one is an eschatological savior figure who will destroy evil and will bring about the renovation of the world. He is called Saoshyant, which means the beneficent in its single form. Yet, in its plural form, it is considered to mean the redeemer. The Khorda Avesta describes this savior as such:

Whose name will be the victorious SAOSHYANT and whose name will be Astvat-ereta. He will be SAOSHYANT (the Beneficent One) because he will benefit the whole bodily world; he will be ASTVAT-ERETA (he who makes the bodily creatures rise up), because as a bodily creature and as a living creature he will stand against the destruction of the bodily creatures, to withstand the Druj of the two-footed brood, to withstand the evil done by the faithful. [4]
Accordingly, the Soashyant will rise at the end-time and fight against the vices in the world and spread justice and goodness far and wide. 

Maitreya: The Future Buddha

In some of the Buddhist references, such as the Amitabha Sutra and the Lotus Sutra, we read about the future Buddha of this world, called Maitreya, who will be a successor to the present Buddha. In Sanskrit, Maitreya means kindness and love. According to Buddhist religious texts, Maitreya will be the fifth and last Buddha who will appear on the earth. The arrival of Maitreya is expected at a time in the future when the dharma will have been forgotten by most on the earth. That is when Maitreya will appear on the earth to achieve complete enlightenment and to teach the pure dharma [5].

Li Hong: The Last Savior in Taoism

The Taoist last savior, called Li Hong, is depicted as an ideal leader who would reappear to set right heaven (tian) and earth (dì) at a time of upheaval and chaos. Li Hong will appear at the end of the world cycle to rescue the chosen people, who would be distinguished by certain talismans, practices, and virtues [6].

Savior in Abrahamic Religions

Moshiach: The Last Savior in Judaism

The Jews belief in the savior is manifested in the idea of the coming of Moshiach (i.e., Messiah). This person is believed to be a descendant of King David, who will "gather the Jews from all over the world and bring them back to the land of Israel" [7]. There are many verses in different scriptures and Talmudic [iii] literature which refer to this figure and enumerate his characteristics and manners [iv]. For instance, Isaiah says:

And there shall come forth a rod from the stock of Jesse [King David's father], and a branch shall grow from his roots; and the spirit of the Lord shall rest upon him, the spirit of wisdom and understanding, the spirit of counsel and might, the spirit of knowledge and of the fear of the Lord. And his delight shall be in fear of the Lord; and he shall not judge by what his eyes see, nor decide by what his ears hear. But with righteousness shall he judge the poor, and decide with equity for the humble of the earth; and he shall strike the earth with the rod of his mouth, and with the breath of his lips shall he slay the wicked.
–Isaiah 11:1-4

Those who follow Judaism believe that their savior has not been born yet. Therefore, they are eagerly awaiting the coming of the one who will save them and establish a just dominion in which "there will be world peace, no more wars nor famine, and, in general, a high standard of living" [7]. 

The Messiah: Jesus Christ (PBUH) the Savior of Mankind 

Christians believe that Jesus Christ (PBUH) is himself the savior of humankind, and he was born for this purpose. The name Christ literally means "the anointed one" or the Messiah [8]. As the Gospel of Matthew says, Jesus Christ (PBUH) has been sent to "Save his people from their sins" (1:20-21). It is also believed that Jesus Christ (PBUH) had been crucified to atone the sins of humanity and lead them toward salvation. According to Christian sources, Jesus Christ (PBUH) was the savior who was awaited by the Jews as whose coming was predicted in the Torah as the Moshiach. 

Another point which makes Jesus Christ (PBUH) the awaited savior in Christianity is the idea of his second coming or the Second Advent in the end-time to whose "day or hour no one knows, not even the angels in heaven, nor the Son, but only the Father" (Mark 13:32). This is the belief in "the future return of Christ in glory when it is understood that he will set up his kingdom, judge his enemies, and reward the faithful, living and dead" [9]. Different gospels, including Matthew chapters 24–25; Mark, chapter 13; Luke, chapter 21:5–26, and John, chapter 14:25–29, are mentioned as the evidence for this belief. Moreover, according to biblical verses, there will be many signs indicating the end-time among which the second coming of Jesus Christ (PBUH) and the last judgment. 

Therefore, like many other religions, Christians also believe in a savior or as they call it the Messiah, who will make this world a better place and free it from oppression and injustice. 

Imam Mahdi (AS): The Awaited Savior in Islam

In Islam, the belief in the savior is rooted in the fact that Allah never leaves His creatures, especially human beings, on their own and support them through sending His apostles to guide them toward the right path: "and there is a guide for every people" Quran (13:7). He had sent 124000 prophets (PBUT) first, followed by righteous leaders who continued the path of previously chosen messengers of Allah. As the Quran says, "Certainly We wrote in the Psalms, after the Torah: 'Indeed My righteous servants shall inherit the earth.'" (21:105).

 Therefore, the earth will never become empty of Allah's guide, and people will benefit from these guiding lights either directly or indirectly. Imam Mahdi (AS), the twelfth leader of Muslims and a descendant of Prophet Muhammad (PBUH&HP), who is leading a secret life at the time, will ultimately rise and spread peace and humanity throughout the earth. "The Holy Prophet (PBUH&HP) informed Muslims about his reappearance, telling his names, attributes, appellations, and peculiarities" [10]. The time of his coming is unknown, and it is followed by the preparation of particular circumstances. 

The signs that indicate his coming include "Widespread injustice and oppression, the advent of Dajjal (Anti-Christ) who would misguide the thinking of the people, the advent of Sufyani who is one of the pillars of mischief and corruption on the earth, the formation of the Islamic army, which would raise up black standards, the voice of the angel of the sky giving glad-tidings of his reappearance, the coming down on earth of Jesus Christ (PBUH) and his paying allegiance to and praying behind in congregation Prayers led by Imam Mahdi (AS)" [11]

This belief in the last savior, who would stand against tyranny and injustice and remind human beings of their real value, also, highlights Islam's optimism toward the future of the world.

Finally, we have reviewed the belief in the last savior or the person who will save humankind from the evilness and destruction in this world in different faiths and religions. On a more in-depth look, we can find many similarities between these beliefs. However, the Abrahamic religions had a more precise and more tangible attitude toward the idea of the last savior and the time of his coming. Therefore, the concept of the savior is one of the most essential and significant matters regarding the future of human destiny. 

Notes:
[i] Opposite to dharma, which includes unnaturalness, wrongness, evil, immorality, wickedness, and vice. 
[ii] The period when humanity will be governed by gods and every manifestation or work is close to the purest ideal, and humanity will allow intrinsic goodness to rule supreme.
[iii] The central text of Judaism and the primary source of the Jewish religion. 
[iv] Isaiah 2, 11, 42; 59:20, Jeremiah 23, 30, 33; 48:47; 49:39, Ezekiel 38:16, Hosea 3:4-3:5, Micah 4, Zephaniah 3:9, Zechariah 14:9, Daniel 10:14. 

References:

1. Samsara
2. the man on the white horse
3. The Vishnu Purana, trans. Horace Hayman Wilson, London: Trübner & co., Book IV, Chapter 24.
4. Khorda Avesta, Translated by James Darmesteter (From Sacred Books of the East, American Edition, 1898.), Part five
5. Buddhism
6. Anna K. Seidel. "Perfect Ruler in Early Taoist Messianism: Lao-tzu and Li Hung." History of Religions, Vol. 9, No. 2/3
7. The end of days
8. what does christ mean
9. second coming
10. Sayyid Ali al-Husayni al-Milani, The Promised Savior: An inquiry into the imamate of Imam Mahdi (as) from the viewpoint of Muslim thinkers, part 1, p.8. 
11. Baqir Shareef al-Qurashi, The Life of Imam al-Mahdi, Trans. Sayyid Athar Husayn S.H. Rizvi, p.259-283. Pdf. 

Globally, the word “jihad” may be one of the scariest words associated with Islam in people’s view. Terrorism and Islam are almost intertwined when people talk about this religion. When you talk about Islam, many people may think of ISIS, Al-Qaida, Taliban, and the like which have portrayed an internationally terrifying picture of Muslims. On the other hand, most Muslims believe that the real Islam and the original meaning of “jihad” have been defamed by these terrorist groups. 

What does jihad mean?

The word “jihad” denotes an attempt and trying. In Islam, this word means doing as Allah commands in a special way that mostly requires hard work and sacrifice for his sake. It would be quite wrong merely assume fighting and killing enemies as the meaning of “jihad.” As a matter of fact, this word has a lot of meanings and “fighting” is only one of them. 

According to the Holy Quran, jihad can be waged even without fighting enemies, but by spending your wealth on the needy.

The faithful are only those who have attained faith in Allah and His Apostle and then have never doubted, and who wage jihad with their possessions and their lives in the way of Allah. It is they who are truthful.  (49:15)

The Holy Quran says that the Meccan early Muslims who left all they had in Mecca and moved to Yathrib (today called Medina) had done “jihad,”

Indeed, those who are faithful and those who have migrated and waged jihad in the way of Allah—it is they who expect Allah’s mercy, and Allah is all-forgiving, all-merciful. (2:218)

Sometimes the word jihad means fighting not with the enemies but with yourself. In Islamic insight, controlling your evil and harmful desires is actually considered to be an example of jihad. Surprisingly, this kind of jihad is actually more important and nobler than the other types. In this regard, Imam Sadiq (AS) says,

Once, the Holy Prophet (PBUH & HP) sent a group of soldiers to the battlefield, and when they came back, the Prophet (PUBH & HP) told them, ‘welcome to the people who accomplished their little jihad and still have to do the greater jihad.’

 People asked, ‘Oh, Messenger of Allah! What is the greater jihad?’ 

He replied, ‘fighting with yourselves.’ (1) 

Was the Prophet eager to wage wars?

In Islam’s view, fighting is originally only for defending ourselves against invaders not for attacking innocent people. 

The first fight of the Prophet (PUBH & HP) named “Badr”, was with the Quraysh (the people of Mecca who were mostly the Prophet’s relatives). After Muslims moved to Medina from Mecca, the polytheists seized all of their belongings and were planning to sell them. A large number of soldiers escorted the caravan that was moving the belongings of Muslims from Mecca. Muslims decided to fight with them and take their belongings back. 

There was a polytheist named Utbah ibn Rabi’ah who wasn’t sure whether to fight with the Prophet. He talked to his army, riding a red camel, Oh, my people! Hear me out and do not fight this man and his followers. [if you worry about being called chicken hearts for not fighting] consider this shame on me and tell others that I was scared. You have so many close relatives among them and if you fight, so many of them will be killed and you, afterward, will have to live with the ones who have killed your fathers and brothers and it will leave animosity and a grudge among you. Note that if you kill them, they will kill as many of us as we have killed them. Furthermore, it is possible that you lose… Oh, my people! If Muhammad is a liar, the wolves of the desert will remove him and if he is a king, you will have a good life in his territory and if he is a real prophet, he will make you the happiest people in the world. (2)
The Prophet was so hopeful that they will listen to Utbah and that he won’t be forced to fight with his relatives. About Utbah the Prophet said, If there was only one good person among them, it would be this person on the red camel and they will do their best if they listen to him. (3)

Then, the Prophet wrote a letter to the Quraysh and encouraged them to go back to Mecca (4) but they didn’t accept and fought against the Prophet. The Muslims won this battle. 

The Arabs before the Prophet (PBUH & HP), were always fighting with each other. But, the message of Islam made them all like brothers. The Holy Quran says,

Hold fast, all together, to Allah’s cord, and do not be divided [into sects]. Remember Allah’s blessing upon you when you were enemies, then He brought your hearts together, so you became brothers with His blessing. (3:103)

Does jihad mean invading?

If you carefully read the verses of the Quran about fighting and jihad, you would understand that in the Islamic view, Muslims only fight for defending or against the ones who betray Muslims; for example, those who put the Muslim lives in jeopardy by helping their enemies.

In this regard, the Holy Quran says,

Fight in the way of Allah those who fight you, but do not transgress. Indeed, Allah does not like transgressors. (2:190)

About some polytheists who betrayed the Prophet (PBUH & HP) by violating the items of a treaty between the Prophet (PBUH & HP) and them, the Holy Quran says,

How can such polytheists have a treaty with Allah and His Messenger, except those you have made a treaty with at the Sacred Mosque? So, as long as they are true to you, be true to them. Indeed, Allah loves those who are mindful ˹of Him˺. How? For if they get the better of you, they will observe toward you neither kinship nor covenant. They please you with their mouths while their hearts spurn you, and most of them are transgressors. (9:7&8)

Therefore, the holy Quran ordered the Prophet (PBUH & HP) to forget about the treaty and fight with those polytheists because they betrayed the Muslims. 

 Muslims are eager to have peace with others but yet they can’t stand to be oppressed, invaded, bullied, etc. Fight them until persecution is no more, and religion becomes [exclusively] for Allah. Then if they desist, there shall be no reprisal except against the wrongdoers. (2:193)

Muslims believe that instead of fighting, people must be united in worshipping Allah which is the common belief of Muslims, Jews, and Christians. So, Muslims do not want to fight with the Jews or Christians except if they invade first. The Holy Quran says,

Say, ‘O People of the Book (Christians and Jews)! Come to a common word between us and you: that we will worship no one but Allah, that we will not ascribe any partner to Him, and that some of us will not take some others as lords besides Allah.’ But if they turn away, say, ‘Be witnesses that we have submitted [to Allah].’ (3:64)

The Holy Quran says that we should always be fair, even with our enemies,

O believers! Stand firm for Allah and bear true testimony. Do not let the hatred of a people lead you to injustice. Be just! That is closer to righteousness. And be mindful of Allah. Surely Allah is All-Aware of what you do.  (5:8)
And, If any of those idolaters seek your protection, protect him so that he will be able to hear the words of God. Take him to a place where he is safe because they are people who do not know the truth. (9:6)
About the wars of the Prophet (PBUH & HP), Imam Sadiq (AS) said,

The Prophet (PBUH & HP) told his soldiers, “…do not over-kill and do not cheat them and do not cut their bodies into parts and do not kill the elders, kids, or women and do not cut the trees except if you had no choice. And if any of the Muslims saw one of the polytheists, that polytheist shouldn’t be harmed until he hears the words of Allah. If he obeyed you then he is your brother and if he didn’t, then take him to a safe place [and let him go]. (5) 

Resources

1.  Al-Kafi, Shiekh Koleini, vol.5, pg.12
2.   Maghazi, al-Vaghedi, vol.1, pg.63
3.   Maghazi, al-Vaghedi, vol.1, pg.60
4.   Maghazi, al-Vaghedi, vol.1, pg.61
5.  Vasa’il ash-Shia, Sheikh Hurr al-Ameli, vol.15, pg.58