It seems to me that we will be nearer to understanding terrorism if, instead of looking at what terrorists have in common, we look at what is common to their victims. The targets of terrorism are groups, nations or races. And they are distinguished by their worldly success either material or social.
Finally - someone who understands it's the bored and the jealous. It's the folks who "feel" they should have more - even if having more means destroying what others have... Didn't God warn about those who "covet"...
See reply 41.