Blacksheep
Your raise an interesting point as to the reasons for "ongoing" terrorism. While you could point at religious sectarianism, nationalism and poverty for the roots of Northern Irish terrorism, but you'd now have to include drugs, racism and power for current reasons. Take a trip to Ireland, and find out. I'd also suggest that everyone pays a visit to Israel. It depressed me incredibly.
Again, I would stress that I am not merely saying that poverty causes terrorism, but that to seek one cause for it in Islam is also fallacious. It's like trying to find one cause for the rise of Hitler. And while the inidvidual terrorists named here may not be poor, they would probably argue that they fight on behalf of the poor and disenfranchised (not that I would agree with that).