A message for white people: I know how jarring it may be to hear a non-white person, or maybe anyone, even say the words “white people,” as it can take on a pejorative connotation. That’s fine. This isn’t always comfortable to have to say, but that doesn’t make it any less true, necessary, or timely. Before I get started, I want to be clear, this is for all white Americans. To my friend, to my foe. To my colleagues, my contemporaries, and my competitors. To the professional athlete and the pee-wee league coach. To my family members. From late night...