Yeah that's true for something like body weight, which all peoples can variate in. But skin colour and nationality can't really be put into that same context. You're suggesting skin colour and/or nationality are things to be ashamed of, and therefore unpleasant to be branded as a part of - which isn't true. Being black/brown/pink/green isn't a 'deformity', and so it shouldn't upset you if you were referred to as someone of that kind.
Having it taken out is pretty stupid, really. Especially if there are people who realise it's been taken out. I think I said in an older post about racism or something, people really ought not be as insecure as they bloody are. "Paki" is just an abbreviated form of "Pakistani", just as "Brit" is for "British" or "Briton". In gatherings of like-coloured people, they always brag about their pride in being black/brown/white/yellow, but then it suddenly becomes a sin for someone to recognise them as that.
Don't really get it myself, really.