There was a Muslim kid who studied at Holy Names College in Oakland, CA. He was born in Saudi Arabia and helped at his family's lemon and date farm, and also worked for a relief society in Afghanistan. He was conservative and by all appearances put his faith into practice. He was just the kind of young man many would hold up as a posterchild for interreligious dialogue... Not only was he a Muslim, but he studied at a Catholic University, helped his family in their business and helped his fellow man when they needed it most. Everyone seemed to like him... Then September 11th came and the nice young man who went to the Catholic College and helped on the farm helped fly a jet into the Pentagon.
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Maybe I should cite the attacks in Norway and then conclude that all conservative Christians are terrorists. Or maybe I should cite the decades/centuries of violence in Ireland. Except that would be tacky and demeaning to the victims, and most conservative Christians would vociferously protest that conclusion. Stereotyping isn't fun when it gets turned around on the people doing the stereotyping.
I'm not going go through all of your examples. Deconstructing the first one is sufficient. His
Wikipedia Article tells us that he became frustrated with getting rejected from civil aviation school and his views of Islam became increasingly radical. He then lied to his family, left the country, and was recruited by al-Qaeda:
His brother, Yasser, relayed that Hanjour, frustrated, "turned his attention toward religious texts and cassette tapes of militant Islamic preachers."
This wasn't some guy just arbitrarily deciding to become a terrorist as if it were a decision to change careers. There is a documented history of his descent into lunacy and what he eventually ended up doing because of it. I do notice that you left this part out of your story.
For every 1 radical Islamic terrorist out there, there are hundreds of thousands of Muslims who would never do such a thing, and would condemn terrorism like the rest sane humanity.
That is what makes terror so truly terrible. It can be perpetrated by people who appear just like you and me. Doctors from London, students at your Cathlolic University... And the fact is, they aren't all that different. So long as we repeat the meme that acts of violence are perpetrated only or even mainly by the fringe, or only by those that have no money and are being taken advantage of, we will gain little headway. How does one overcome it? I wish I knew... I have Iraqi comrades that will point blank tell you that they hated America 7-8 years ago, but now would fight and die by your side as a brother. What makes one man have a change of heart, while another who went to a Catholic School and helped handicapped children flies a plane full of civilians to their death? What makes otherwise intelligent men and women embrace the cause of martyrdom through committing atrocities? That is a complicated and multi-faceted issue with no easy answers.
Terrorists
are the lunatic fringe. Just because intelligent, well-off people wind up there doesn't mean that they aren't crazy. It takes a pretty large dose of insanity and cognitive dissonance to rationalize terrorist violence, especially on the scale of 9/11. Not all crazy people are babbling weirdos who think they're Shakespeare.
The point is that there isn't something inherent to Islam that makes all of its adherents terrorists or supporting of terrorism. However, there is a common theme across all terrorist groups, regardless of religion. Add one charismatic leader, a dash of conflict, and a handful of frustrated people and you have a recipe for terrorism.
It's a good example of mob mentality and/or the cult psychology. To be honest, I think it's a blend of both. You have enough people throwing popular support behind the movement: that's the mob mentality. You have a charismatic leader who can spin anything (no matter how crazy) into something rational: that's the cult mentality. Combine the two and you'll get recruits for terrorist operations.