Yep, I know that. Can you think of any way that the fact that it was once caused this causes a problem in anybody's life though? Would you have known to be offended by this if somebody hadn't told you about it? Do you agree that there are more worthwhile things to focus on?
If we look hard enough, we might find all kinds of things that once upon a time had some vague connection to racism. My question, and I'm genuinely asking here, is so what?