Ignorance of society identifying/terming humans. We're all a composite of colors -- all races have urban/slang terms and some more user friendly than others. Even Aryan (white) term is outdated today and I haven't heard the "coloured" term used in decades or at least in the west. Per science facts determining visible wavelengths in color theory and basis for the educated art world, black and white are NOT even colors so you see we're all equal in color theory so let's make it simple. White contains visible light - black void of any (in dark/light world) but we wrongly refer to black and white as colors the same as yellow/blue/red, etc. No big deal as all races are coined some derogative/disparaging terms, but I understand your point.
I can't tell you how many times here in the West I've been termed "a gringo" by children of Hispanic or Latino heritage - it's hilarious and that's what they've 'heard' out of the mouths of the parents. I don't take it personally and not as bad as some words we've all been called. I thought a "gringo" was someone that didn't/couldn't eat salsa/peppers like my husband but I consume more of that stuff than they do and felt I was almost Mexican.