And my view is that he has no reason to contact you at all, but threatening to fight someone is fairly serious. I wouldn't be happy with it, but lest we forget you did threaten to deck him and mocked him for everything from baldness, to height, to weight, etc being the classy man you are. Obviously that is all fine and it is just gender and race that upsets you. If he did it I will say straight up it is wrong.