They are substantially more willing to use violence, treat gays and women terribly, and suppress other religions. But these are all things for which western elites can forgive the Muslim world. Now however, those westerners are beginning to realize that Muslims are creationists. If they aren't careful, they'll soon be almost as hated as Sarah Palin.
Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience.