One of my favorite books is Winston Churchill's "The River War," about the Anglo-Egyptian campaign in Sudan in the 1890s. Among its many memorable passages is Churchill's meditation the nature of Islam. Recent events make me think it's worth dusting off:
How dreadful are the curses which Mohammedanism lays on its votaries! Besides the fanatical frenzy, which is as dangerous in a man as hydrophobia in a dog, there is this fearful fatalistic apathy.