A few weekends ago, at a seersucker-in-November southern horse-racing event I attended with some lovely and friendly people who will nevertheless be the first ones taken out when the revolution comes, a family friend, an older white man, asked me what I, the one sportswriter he knew, thought of the kneeling NFL players. I told him that while I stand for the anthem myself, I supported the players’ right to express themselves politically and encouraged him to worry less about the kneeling and more about what the players were trying to say. He snorted and said he was done with...