I couldn't find this video again but recently there was a march done by a white nationalist group in black and yelling white power.
The cops were following them and making sure they don't get hurt. They were circling the block making sure no one approached them and then driving slowly behind them. I remember that happened a few months ago too, a black area had Nazis pull guns on children yelling racial slurs, the cops were seen giving the Nazis water and letting them change clothes even. They let them go away saying that they had free speech.
Meanwhile if they were black you'd have cops pulling them over. You know how they react with protesters.