The Qur'an is a Book revealed to people as a guide to the true path and in this Book, God commands man to adopt good morals. This morality is based upon concepts such as love, compassion, tolerance and mercy. The word "Islam" is derived from the word meaning "peace" in Arabic. Islam is a religion revealed to mankind with the intention of presenting a peaceful life through which the infinite compassion and mercy of God manifest on earth. God calls all people to Islamic morals through which compassion, mercy, peace and tolerance can be experienced all over the world. In Sura Baqara, verse 208, God addresses
believers as follows:
O You who believe! Enter absolutely into peace (Islam). Do not follow in the footsteps of Satan. He is an outright enemy to you.
As the verse makes clear, security can only be ensured by "entering into Islam", that is, living by the values of the Qur'an. The values of the Qur'an hold a Muslim responsible for treating all people, whether Muslim or non-Muslim, kindly and justly, protecting the needy and the innocent and "preventing the dissemination of mischief". Mischief comprises all forms of anarchy and terror that remove security, comfort and peace. As God says in a verse, "God does not love corruption". (Qur'an, 2:205)
Murdering a person for no reason is one of the most obvious examples of mischief. God repeats in the Qur'an a command He formerly revealed to Jews in the Old Testament thus:
...if someone kills another person - unless it is in retaliation for someone else or for causing corruption in the earth - it is as if he had murdered all mankind. And if anyone gives life to another person, it is as if he had given life to all mankind... (Qur'an, 5:32)
As the verse suggests, a person who kills even a single man, "unless it is in retaliation for someone else or for causing corruption in the earth", commits a crime as if he had murdered all mankind.
This being the case, it is obvious what great sins are the murders, massacres and attacks, popularly known as "suicide attacks", committed by terrorists.