The Iraq war was certainly part of it. But the stability of Northern Africa was utterly destroyed beginning in Libya, moving East across the continent to Egypt where the country seemingly still has not recovered. Obama almost bombed the Assad regime until military servicemen declined to be Al Qaeda's air force. Quite clearly there is more at play than just asinine foreign policy decisions -- this is about regime change across the Middle East, and clearly it's gotten out of control now -- on Obama's watch, mind you. And by the way, my "narrative" has always been indict Bush and Cheney for war crimes, so you need to think outside of the box and get out of this left-right paradigm.
What do you mean by radicalization? You don't think it's pretty radical to invade countries that had no part in attacking us while at the same time protecting the true culprits because they have the oil? Or is it because the left sort of agrees with it as well, along with the Patriot Act? The Republican party now is far more sane than after 2001, even despite their anti-immgration rhetoric.