If the reply is fallacious, then show that it's fallacious. If it is fallacious then it shouldn't be used as an argument irrespective of whom it's aimed it. If the reply doesn't contain some logical flaw, then it simply doesn't matter whether its opponent is black or white or anything else: neither truth nor logic are subject to whether people like them.
If the reply is fallacious, then show that it's fallacious. If it is fallacious then it shouldn't be used as an argument irrespective of whom it's aimed it. If the reply doesn't contain some logical flaw, then it simply doesn't matter whether its opponent is black or white or anything else: neither truth nor logic are subject to whether people like them.