Identity politics kills. If there is any lesson to be drawn from the killing of Justine Ruszczyk Damond, that is it. The city of Minneapolis was so eager to have a Somali Muslim police officer on the force that it hired a man who had been found incompetent to hold the job. Further, it did not fire him even when he proved that he was indeed unfit to be a cop. Fox News has reported that “the former Minneapolis police officer charged in the shooting death of Justine Ruszczyk Damond once put a gun to a driver’s head during a...