When facing a question like this, you may find a group of people who try to justify that Islam is not a religion of peace. They usually refer to terrorist attacks by pseudo-Muslims and conclude that Islam is not a peaceful religion. Peace in Islam is a value and an ultimate goal of life; may it be personal, social or worldwide.

But let’s see what is Islam’s viewpoint about war and if it approves terrorism.

What Do We Mean by Peace in Islam?

Before discussing the main topic of this article, we have to understand what peace in Islam means. According to Merriam Webster dictionary, “peace is a state of tranquility or quiet such as:

Freedom from Civil Disturbance
A state of security or order within a community provided for by law or custom.
Freedom from disquieting or oppressive thoughts or emotions 
Harmony in personal relations.” [1]

Therefore, there are two types of peace defined above; social and individual. Islam not only talks about individual peace, but also all of its rules are based on logic to shape a peaceful society. In this article, we would focus on social aspects of peace in Islam, either within one country or on what goes on between different countries.

Peace in Islam

Allah emphasizes in the Quran that Prophet Muhammad (PBUH&HP) is a mercy towards all human beings: “We did not send you but as a mercy to all the nations” (21: 107). It can be understood from this verse that a worldwide mercy, peace, and tranquility is the goal of sending Prophet Muhammad (PBUH) with the religion of Islam.

Imam Ali (AS) in his letter to Malik al-Ashtar (his appointed commander in another country) wrote: “Develop in your heart the feeling of love for your people and let it be the source of kindliness and blessing to them. Do not behave with them like a barbarian, and do not appropriate to yourself that which belongs to them. Remember that the citizens of the state are of two categories. They are either your brethren in religion or your brethren in kind. They are subject to infirmities and liable to commit mistakes.”  [2]

He specifically notes that we should be tolerant of people who have no bad deeds against Muslims and the religion of Islam.

Are Muslims Peaceful towards Everyone?

In social relations The Quran defines Muslims as moderate people; “Muhammad, the Apostle of Allah, and those who are with him are hard against the faithless and merciful amongst themselves. “ (48:29)

By referring to the above verse and by going through its interpretations we find out that “Muslims should be harsh on infidels. Who are these infidels? Muslims should not be harsh on anyone who does not believe in Islam. They should behave kindly towards those who are not opposed to them, who do not plot against them, and who do not seek to wipe out their nations - even if they follow other faiths.” While at the same time “Muslims should be harsh on those who fight against Islam and their identity, nationality, country, independence, honor, dignity, traditions, culture, and values.” [3] Therefore, it is completely rational for Muslims to defend themselves while their values are being attacked, and it has no contradiction with their peaceful nature.

Does Islam Allow Terrorist Attacks?

In recent years we have seen different terrorist groups such as Taliban, Al-Qaida or ISIS, who under the name of Islam, have committed terrorist attacks in different countries. They refer to verses of the Quran that are about the holy struggle (Jihad) and use those verses as a permission for their terrorist acts.

However, their interpretations of the verses of the holy struggle (Jihad) are not correct. The fact is that war is prohibited in Islam, and Muslims are not allowed to start a war against other countries for the sake of conquest or even for spreading the religion of Islam. Jihad is allowed for Muslims only if:

They are attacked by other countries, and their lives and properties are at risk.
If other Muslim territories are under attack by oppressive governments.
If other powers attack Muslim territories to annihilate Muslims or their religion.

“In the holy struggle (Jihad), violating or infringing on others' rights is not allowed. Killing other people under baseless pretexts is not part of the holy struggle (jihad). Neither is killing those who are not Muslims. Such acts are not allowed in the holy struggle (Jihad). Not all those who believe in religions other than Islam should be treated with harshness. Rather, only those who are opposed to Islam, your independence and territorial integrity, and Islamic culture, identity, and values should be treated with harshness. If carried out under these conditions, the holy struggle (Jihad) is considered as a divine order and will bring about glory to nations.” [4]

It is only under these conditions that Muslims are allowed to fight against the oppressors. And even when they are allowed to defend themselves and enter the war, they have to make sure to follow the rules of war. They are not allowed to kill the children or elderly of the infidels, or to poison the cities of the infidels. [5]

They have to tolerate the refugees, and if they betray them, they will face punishment [6]. Also, they should observe the rights of the captives of war [7]:

“Allah does not forbid you from dealing with kindness and justice with those [polytheists] who did not make war against you on account of religion and did not expel you from your homes. Indeed Allah loves the just. Allah forbids you only regarding those who made war against you on account of religion and expelled you from your homes and supported [the polytheists of Makkah] in your expulsion, that you make friends with them, and whoever makes friends with them—it is they who are the wrongdoers.” (60: 8-9)

Islam Is a Peaceful Religion, not a Passive One

In conclusion, Islam is a religion of peace for Muslim people and peaceful people. It is not a passive religion to sit and watch all the cruel things that are happening in the world and smile at it. Islam is the life map for those who wish to reach human perfection which is only achieved by obeying all of its rulings. No matter you call it Islam or something else, but every sane human being, by studying The Quran and searching about Islam, will understand that Islamic rules have been designed to make the society a safe place for human growth.

References:

1. peace
2. Malik Ashtar richest treasure
3. view of Jihad
4. ibid
5. Mafatih al-hayat, p. 318
6. Mafatih al-hayat, pp. 419- 20
7. Mafatih al-hayat, p. 423

Prophet Muhammad (PBUH&HP) was the last messenger of Allah Almighty sent to human beings to guide them towards a more prosperous and meaningful life: "O Prophet! Indeed, We have sent you as a witness, as a bearer of good news and as a warner. and as a summoner to Allah by His permission, and as a radiant lamp." (33:45-46). 

You might be interested to know more details on his delegation (be' tha). So, follow us to find out more.

1. How did Prophet Muhammad (PBUH&HP) Receive his First Revelation?

Prophet Muhammad (PBUH&HP) was born into the tribe of Quraysh, one of the prominent tribes of Mecca. He was known as an honest and faithful man such that he was called Al-Amin [i], meaning trustee. 
He used to spend some hours alone out of town in Hira cave to worship, contemplate and reflect the state of people of that time and the aspects of creation. It was during one of these occasions that he received the divine message of prophethood. He was nearly 40 at that time. It was Rajab the 27th on 610 CE that the Archangel Gabriel (Jibreel) appeared before him and said: "Read." Muhammad (PBUH&HP) replied: "I am not able to read." This was repeated two more times. Then, the angel Gabriel recited the first verses of the Quran:

"Recite in the name of your Lord who created -
Created man from a clinging substance. 
Recite, and your Lord is the Most Generous –
Who taught by the pen -
Taught man that which he knew not." (96:1-5)

And, his mission started there.

2. How Was the Condition of the People in that Era?

According to Imam Ali (AS), Allah Almighty sent Prophet Muhammad (PBUH&HP) as a warner (against vice) for all the worlds and a trustee of His revelation. That was while the people of his time were following the worst religion. They resided among rough stones and venomous serpents, drank dirty water and ate filthy food, shed each other's blood, and did not care about their relationships. They worshiped and respected Idols, and sins were clinging to them [1].

3. Who Testified to the prophethood of Muhammad (PBUH&HP) First?

Imam Ali (AS) sometimes accompanied Prophet Muhammad (PBUH&HP) when he went to Hira cave. And, the day that the Archangel Gabriel appeared before the Prophet (PBUH&HP), Imam Ali (AS) was there, too. Prophet Muhammad (PBUH&HP) said to Imam Ali (AS) that: "O Ali, you see all that I see and you hear all that I hear, except that you are not a Prophet, but you are a vicegerent and you are surely on (the path of) virtue." [3].

Afterward, being perplexed by this happening, Prophet Muhammad (PBUH&HP) went home to describe what has happened to his wife, Khadija (AS). She (AS) was the first woman who testified to the prophethood of Muhammad (PBUH&HP). And according to the authentic resources, the first man was Ali (AS) [2]. Imam Ali (AS) has described the situation like this: "In those days Islam did not exist in any house except that of the Prophet of Allah (PBUH&HP) and Khadijah (AS), while I was the third after these two." [3].

4. How Did people react to Prophet Muhammad (PBUH&HP) Claim about His Prophethood?

In the beginning and according to divine guidelines, Prophet Muhammad (PBUH&HP) did not reveal his revelations publicly. Still, it was confined to a small circle of his family, close friends, and whoever he thought was eligible. In this period, the aim was to find real loyal fellows, although few. Of course, polytheists found about it, but they did not take it seriously [4].  

Three years later, Prophet Muhammad (PBUH&HP) began to preach to his clan members by receiving the command to "Warn the nearest of your kinsfolk" (26:214). But he mostly received ridicule and mockery. Allah Almighty ordered him not to give up and make his mission publicly known: "So proclaim what you have been commanded, and turn away from the polytheists" (15:94).

The rich people of Mecca saw their power and wealth in danger with the ideas that Muhammad's (PBUH&HP) new religion proposed like social equality, sharing the wealth with needy people, and rejecting idols. On the contrary, people of the lower classes, slaves, and women were those who embraced Islam very soon [4]. 

According to the details above, Prophet Muhammad (PBUH&HP) was chosen by Allah almighty at the time when humanity was at its dawn, and morality was long disappeared among humankind. He was the one who once more reminded human beings of the concept of humanity and the reason for creation.

Notes:

[i] In the "Age of Ignorance" (before the advent of Prophet Muhammad (PBUH&HP)), people did not trust each other much and did not care about the safekeeping of others' affairs. But, everyone in Mecca trusted Prophet Muhammad (PBUH&HP), and when they went to business travels, they entrusted their valuable goods to him. So, he was given the nickname "Al-Amin." And, this title continued to be used for the Prophet (PBUH&HP) after the emergence of Islam, too, although some people had become against him since he fought idolatry. 

References:

1. "Nahjul Balaqah", Sermon 26.
2.  Allamah Amini, “Al-Ghadir”, vol. 3, p. 236.
3. "Nahjul Balaqah", Sermon 192.
4.  Jafar Morteza Amoli, “Al-Sahih Min Sirat Al-Nabi Al-Azam”