Actually, he said that he hoped a black man would come out of a pub and start with him, although that thinking is completely out of order too, he wasn’t stalking the streets looking for a peaceful man, but a trouble maker.
Yes, his thinking was horribly racist, but the fact that he was the one that brought it up, shows how ashamed he is. Only he knew about what he did. He had no need to say anything about it, but chose to talk about it, to show how wrong his behaviour and thinking was.