Over the course of my life, I have pondered many improbable situations. For example, what would it be like to play first base for the Atlanta Braves? What would it be like to work as Anna Kournikova’s live-in masseuse? Just how many Muslim terrorists could I kill if the military would ignore my age and let me serve as a sniper? But I never pondered what life would be like as a Jewish student at the University of Texas at Austin – that is, until I read a letter written by 27 anti-Semites and self-hating Jews who teach there. The...