Back in the mid-1990s, Osama bin Laden had a problem, and it was Islam. He wanted to say the Qur'an gave his followers license to kill innocents—and themselves—in the cause of "jihad." That was how he could justify his global campaign of terror. But that's not what the Muslim holy book says, and that's not the way it was interpreted by any of the great scholars and preachers of the faith.
So bin Laden set about spinning the revelations contained in the Qur'an and the sayings of the Prophet Muhammad, known as the Hadith, which provide much of the context for actual religious practice in the Muslim world. The Saudi millionaire wrote a diatribe that he called a declaration of war and then a fatwa, or religious edict, cherry-picking quotations from Islamic Scripture and calling on dubious scholars to back him up. The tracts were political propaganda, not theology, but for his purpose they worked very...