When Trump administration officials post snuff films of alleged drug boats blowing up, of a weeping migrant handcuffed by immigration officers or of themselves in front of inmates at a brutal El Salvadoran prison, I often think of a story St. Augustine told in his "Confessions." In the fourth century A.D., a young man named Alypius arrived in Rome to study law. He was a decent sort. He knew the people at the center of the empire delighted in cruel gladiatorial games, and he promised himself he would not go. Eventually, though, his fellow students dragged him to a match. At first, the crowd appalled Alypius. "The entire place seethed with the most monstrous delight in the cruelty," Augustine wrote, and Alypius kept his eyes shut, refusing to look at the evil around him.