"If the ugliness seems puzzling to you, it doesn't to psychologists who have examined this phenomenon. It’s a form of denial, they say: Deep down, people understand that all lives are fragile, that we are all capable of momentary mistakes or misjudgments that could destroy us. We don’t want to face this terrifying fact. So we must convince ourselves that the people to whom it happens are unlike us. To sustain our delusion of safety, we must make them monsters."