Precisely! They were having a rational, theological discussion and islam, true to form and right on cue, reacts violently and irrationally. How totally ignorant can they be that they cannot grasp that they are PROVING THE POINT OF THE QUOTE IN QUESTION?
Again, what does not piss them off? Cartoons, books, beauty pageants, dogs, soccer tournaments, parties, nightclubs, infidels breathing... what?