Is it possible for an African-American to be a white supremacist? Sure. But it's highly unlikely and there is no evidence of that seen so far. Black Lives Matter activists were disappointed to find out last week that the driver who hit two of their I-5 highway protesters in Seattle—including 24-year-old Summer Taylor who died from her injuries—is an African-American man. They had hoped to paint this as another instance of white supremacy by a Caucasian man trying to kill protesters. But Dawit Kelete, the man who police arrested immediately following the incident, is Black. One might think that would...