TBH i think it is just down to appearances, firstly i don't now any 3/4 white 1/4 black people, but i am assuming that people who do refer those people as black, are maybe just genuinely mistaken, i mean you can get light skinned blacks and dark skinned whites, i have a friend who has a kind of natural tan and people occasionally call him black, hes not
that dark so its probably just a wind up (as in spelling pever with a P is a wind up whilst not paticularly insulting) but he has a friend (i have been told) who is a very dark skinned white and apparently many people think he's black as he has a dark skin tone...
So i wouldn't really put it down to racism, maybe some people do put it that way for some racist purpose, but i think most just use it as an easy labelling system... this is one case where im going to settle with majority rules
I have to be honest though when i was a little un i was rather confused by the whole calling them blacks when many of them have far lighter skin than what you would think of as black skin... i think a little later i realised the whole white thing was a little off as well...
I think the main problem is where we identified races as colours, so anyone with quite dark skin that doesn't go into any of the other groups gets easily misidentified as black... though i suppose even if we had a fancy name instead of black if would be the distinguishing feature people would use to identify blacks anyway...
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