“Bigotry and insanity are different,” Psychiatrist Dr. Dorothy Otnow Lewis says at the beginning of HBO’s documentary Crazy, Not Insane. The idea that someone can kill for perfectly sane, yet irrational reasons goes to the heart of the controversial doctor’s work. Her mother seemed to be able to name every famous anti-Semite. Henry Ford, Richard Wagner, Joe Kennedy and “even Walt Disney,” Lewis lists. The man who made Bambi, which made Lewis cry as a little girl, hated Jews, she bemoans as the film unfolds. You never know what lies underneath even the most innocent appearing exteriors, director Alex Gibney’s (The Inventor: Out for Blood in Silicon Valley, HBO’s Agents of Chaos) documentary, highlights.