Convicted World Trade Center bomber Ramzi Yousef has apparently been passing the time in his 7-by-11-foot cell in a Colorado supermax prison by writing a treatise against the Islamic State. Since I am at least in part responsible for Yousef's current situation, any news about him tends to draw my interest. In a recent interview published by the Combating Terrorism Center at West Point, Bernard Kleinman, the attorney who represents Yousef and several other notorious terrorist figures, said his client had written a 250-page essay denouncing the Islamic State's corrupting influence on Islam....