We take them at their word when they say they want to kill us because of little things like 9/11. When they rattle off their reasons, they include things like world poverty, global warming, and a whole laundry list of grievances ripped off from the Communists. Communists and fascists who slaughter their opponents don't say they're doing it to maintain their perks and power, they claim to be doing it for the good of the nation. Jihadists will say whatever helps them raise funds or appeal to public opinion.
Actually, all I ever hear is that we are messing around in the middle east. Reading this initial post, there is no mention of anything other than that.