Censors feel they are safe with objectionable material but must protect others who are not as smart or moral. The same impulse tempts the reviewer of "The Believer." Here is a fiercely controversial film about a Jew who becomes an anti-Semite. When I saw it at Sundance 2001, where it won the Grand Jury Prize, I wrote "some feared the film could do more harm than good." I shared those fears. The film's hero is so articulate in his retailing of anti-Semitic beliefs that his words, I thought, might find the wrong ears. I understand the film, I was saying--but are you to be...