Thought provoking questions from you..."(on radical islamic fundamentalism)" I believe we must first of all concentrate on the source. To myself it appears the radical views all come from Saudi Arabia and the particular sect (wahabbe) that interprets the koran and hadith as the only way a muslim can be permitted to live. I am reminded of the statement a Jewish friend of mine often makes: NO ARABS-NO TERROR. I believe she is right.
As they say in red states (USA)...the horse has left the barn.