Islamic communities are approximately free of suicide cases. In fact the total number of people who suicide in all Islamic societies together is less than the number of people who suicide every year in a city like New York or Mumbai or Seoul. The -relatively- few suicide cases in Islamic societies usually occur among nonreligious people. According to Islam, a person who suicide is considered as a non-Muslim.

Another point here we have to know is that when someone does a mistake or a crime you have to blame him only, you don't have the right to blame other people or their beliefs.

Portugal, Spain, Netherlands, Germany, France, Britain, USA and Russia all of these countries have a black history of awful crimes against humanity. But we don't blame the people of these countries and we don't blame Christianity because we know that Jesus – peace of Allah upon him-  is a messenger of peace and love to humanity, a messenger of the true religion, we only blame the bad criminals who administrated these countries and did all these crimes while they were pretending that they are Christians and claiming that they are following the orders of of the God.

Islamic history is full with mercy and peaceful relations that Muslims had taught them to the world, Muslims had practiced merciful policy that hasn't applied before them. You can't blame Islam or Muslims if there are a few people did crimes against Muslims and others. It will not be justice.

In fact many of those terrorists were organized and supported by USA and some other countries in eighties in Egypt and Afghanistan in order to stand against communist expansion. Osama ben Laden was one of them. And after the destruction of USSR he thought to continue the war against imperialism but this time against his former alliance, USA, UK and Saudi Arabia. This is not a matter of religion, it is a matter of ideology; since America and Britain are Christian and secular states while Saudi Arabia is an Islamic state, but all of these countries suffer from his followers attacks. You can blame him only or blame him with his former alliance who established and funded his group, or you can blame the difficult environment of poverty and ignorance in the third world, but you can't blame Islam in that. 

Criminals are blind with hate, you shouldn't be blind with hate or you will forget the way.