as if there wasn't enough reason...

Here's another author you should look up if you can muster the cahones...
Guy by the name of Robert Pape in his recent book, "Dying to Win: the Logic of Suicide Terrorism," take a really firm look at the mentality of our newest "enemy."
The book is so good partly because of the amount of information the man draws from; a database that includes EVERY suicide-bomb attack from 1980-2004.
The conclusions are such that you could probably guess them if you have half a brain (basically that these bombers attack in order to get democratic powers OUT of certain areas, and that invading them only generates more not less. As in Iraq, in which the number of bombings has doubled every year that we have been there.), but the way in which he puts these things together is really well done.