Since the Sept. 11, 2001, attacks, Robert Spencer [whose “Jihad Watch” is featured weekly in HUMAN EVENTS] has been a one-man warning system against radical Islam. A scholar who has spent most of his professional life studying Islam, his string of books dissects the world's largest religion as a bastion of intolerance and hate, justified by the teachings of spiritual leader Mohammed and various holy men. As one of his previous titles, the "Politically Incorrect Guide to Islam," suggests, Spencer does not buckle in fear of the type of backlash that can materialize as a death-threatening fatwa against a critical...