Adam Serwer, writing for The Atlantic:
Trump’s only true skill is the con; his only fundamental belief is that the United States is the birthright of straight, white, Christian men, and his only real, authentic pleasure is in cruelty. It is that cruelty, and the delight it brings them, that binds his most ardent supporters to him, in shared scorn for those they hate and fear: immigrants, black voters, feminists, and treasonous white men who empathize with any of those who would steal their birthright. The president’s ability to execute that cruelty through word and deed makes them euphoric. It makes them feel good, it makes them feel proud, it makes them feel happy, it makes them feel united. And as long as he makes them feel that way, they will let him get away with anything, no matter what it costs them.
Once you begin viewing cruelty as the end itself, as opposed to a means to an end, the policies and practices of Trump begin to make a whole lot more sense.