LONDON, Sept. 18, 2006 — Three words suddenly have a lot of Westerners worried and, it must be said, likely making some wrong assumptions about modern Islam. "Yaum al Ghadab" is Arabic for "Day of Rage." When the Qatari Islamic scholar Yusuf al-Qaradawi called for a Day of Rage this Friday in response to Pope Benedict XVI's remarks about Muslims, it might have sounded like a call for street violence. But if there is trouble Friday, and there could well be, it will not be because of language but because of what some people choose to do after they have...