Wonder what makes a terrorist? Here's the answer. (thanks to www.soundpolictics.com) Two things come to mind.:
First, terrorists are made to be that way, by purposeful training from an early age. The terrorists are unlikely to be rehabilitated at this point.
Second, the training doesn't completely "take" in most cases. Even those who have been trained in institutionalized Islamic rage, do not become terrorists. But the ones for whom the training didn't take, no matter how moderate they may be, know and to some degree understand and sympathize with the thinking of the terrorists.