First off, I would shoot the dog. I would be sad for the dog, but really continued life as a Pavlovian-trained racist killer isn’t worth it. I would be curious what the result would be if you showed these same white people a similar dog attacking a white woman or child. I guess all it would prove is a) they would shoot the dog, so they devalue POC more than they overvalue dogs, or b) they still wouldn’t, in which case they really should go off and live with dogs. All it would do is separate the garden-variety racists from the psychopaths, but that’s useful, I guess.