I think it's interesting that people wouldn't seriously refer to anybody as a redskin outside of a joking environment. I wonder why that is? I mean can you imagine if that sort of language was regularly used by media?
"Today, a man was found murdered in an apartment complex in Arizona. Neighbors described him as a small stature redskin male who kept mostly to himself."
Or what about police?
"We are currently in pursuit of a redskin female. Please be advised, she is armed."
What about advertisement?
"Coming Soon: Maddea's Redskin Reunion"
Or maybe if it were used by politicians?
"Today, we are gathered here to pay respect to all of those code talkers who overcame racism against redskins."
What about history books?
"Sitting Bull was the first of many prominent redskins to not really put up with the US government's policies."
What about talk radio?
"I mean, look at these redskin leaders voting for Democrats in droves."
Now replace redskin with white/black and... tell me again how redskin isn'ta slur when you wouldn't really use it in any type of professional or even a serious context. It basically takes a situation where nobody is serious for that word to not be seen as a slur. Well, if that's the case then nigger is no longer a slur because black comedians use it.