The reason is not traceable to some special devotional attachment to Islam, but is due rather to an inimical attitude towards man. As the suicide bomber ties the bombs on to his body, it is not pro-Islamic, but rather anti-humanity sentiments, which motivate him to adopt such a deadly course. This is a reality that no one in his senses can deny.
According to the Quran, a Muslim is one who is man’s well-wisher. But the greatest weakness of the Muslims of today is that they do not in their hearts possess any feelings of well-wishing towards others. They hold all nations to be their foes. This animosity has so increased that they are ready to cross all moral limits when it comes to attacking their supposed enemies. If they think they can harm them by killing themselves, they are willing to take the extreme step of suicide bombing.
The truth is that suicide is totally forbidden (haram) in Islam. It is forbidden to the point where, if someone is dying, and it is certain that he will not survive, even in his final moments Islam does not allow him to take his own life.
An incident, which illustrates this, has been recorded in Sahih Muslim. It took place in the lifetime of the Prophet during the Battle of Khaybar, one of the defensive battles fought between the companions of the Prophet and their enemies. A soldier from the Muslim side, by the name of Quzmaanuz Zufra, fought very bravely and his death. The Muslims said that he was a martyr and would go to Paradise. But the Prophet said that he would go to hell. The companions were astonished.
So the Prophet asked them to find out the cause of his death. On inquiry, it was discovered that he had indeed fought very bravely for the Muslims and then had fallen down gravely wounded. But then, finding the pain of his injury unbearable, he ended his life with his own sword. (Fathul Bari, Commentary Sahih Bukhari, Kitabul Maghazi, 7/540)
The Prophet’s disapproval of his action makes it clear that suicide bombing is not lawful in Islam under any circumstances. According to Islam, life is so precious that it can never be terminated at will on any pretext. Islam is a harbinger of life. It gives no license for premature death. That is why suicide is unlawful in Islam.