As a child of Holocaust survivors, the president’s public displays of callousness chill me. His proud, unapologetic heartlessness reminds me how humans are capable of unspeakable brutality. Yale University psychology professor Paul Bloom describes cruelty as even worse than dehumanization. Dehumanization is what enables soldiers to enter into battle and kill without moral paralysis. By contrast, Bloom writes, “cruelty is when you act fully aware of the humanity of the persons you are mistreating or humiliating. In fact, that’s the whole point.”