The deluge of commentary on Rudolph Giuliani’s presidential prospects has forced me finally to break my long silence about the man. Somebody’s gotta say it: He shouldn’t be president, not because he’s too “liberal” or “conservative,” or because his positions on social issues have been heterodox, or because he seems tone-deaf on race, or because his family life has been messy, or because he’s sometimes been as crass an opportunist as almost every other politician of note. Rudy Giuliani shouldn’t be president for reasons more profoundly troubling. Maybe you had to be with him at the start of his electoral...