I think it all comes down to the price you pay for having more materially than others.
I think, in the end, those people are pissed off because we live so much better in this country than they do in theirs. It is to their leaders advantage to blame the U.S. for their bad lot in life. If they didn't, the people would start examining the enormously rich ruling class of basically every middle eastern country who just allow their people to subsist or starve to death.
Clever tactic using the opiate of the people and promises of paradise to get people to do the unthinkable.
It has always been thus.
hugs
Joel