"Can't any of you see from the past that most of these guys are psychopaths from troubled backgrounds and have came to islam to justify violence,murder and give them a reason to live and then to die?".
I wonder why the psychopaths didn't embrace Mormonism. Or Buddhism. Or join UKIP. Ah, now I reread your post, Broseph, I see you've already answered my question: it is because Islam unlike the others DOES justify violence and murder. The Prophet (pbuh) actually took his twelve year old wife out for a day to watch the decapitation of eight hundred Jews.