To maintain loyalty, the Democratic party incites anxiety about discrimination and exclusion. A form of reverse race-baiting, perhaps best thought of as bigot-baiting, has become crucial for sustaining the Democratic coalition, which is why we hear so much about “hate” these days. At the recent gay pride parade in New York, a few weeks after the mass shooting at a gay nightclub in Orlando, marchers held aloft an avenue-wide banner that read, “Republican Hate Kills!” It’s important to remember a first law of politics for…