Am I getting this wrong, but when a news story mentions that someone used a "racial slur," is there more than one anymore? Does anyone say "darkies" - or is there still some old Jewish guy speaking offhandedly about "schvartzes?" I did hear, once in the last decade, someone use the word "colored," and remember wondering how long it had been since I'd heard it. There used to be many words, now there is one.
I'm not looking for a list of offensive terms, I'm just wondering if there is a meaning to that. I have to think it's a positive, but I haven't made much study of taboo words, so perhaps one single term with intensity is a worse sign.
I have written about the word nigger a few times over the years. I don't know that my observations have made people any wiser.