for its tenacity:
It's hard to stay outraged for months at a time. I know it takes me some time to work myself up to a frenzy and, once I've torched a building or two, I'm spent. I couldn't possibly work myself up to that degree every day for months on end.
That must be what gives the Arab world its glorious civilization. Oh, wait--they haven't done anything since 1492? Except kill people? Wait till the caliphate returns!