I don't know who is telling you that is my answer. Send them to me and I'll set them straight. Heck, the overdone example is: leave enough whites alone in whitey Germany and they'll decide some folks aren't really white or are bad white and decide to gas them. For something more modern, I can't tell a Serb from a Croat from a Bosnian at 50 paces but they sure can. Its not just a white thing either. Our Asian brothers lectured me once on differences between Korean, Chinese and Filipino women, or was it Japanese......point is, I can't tell the difference possibly because I grew up not caring in a fairly diverse place, but they sure can.