They were still slaves a century and half ago and they've only been able to vote for 50 years. They only want you to not say one word out of all the words ever invented by humans. Do you really feel it's that unfair to not be able to say one word?
No, what's awful is that he says point blank that "it's not to lessen the power of the word nigger, it's to increase the power of my own name."
Nothing wrong with exploring racial taboo, but this guy is the man who shits on art and calls it art to make a statement glorifying himself.
Or maybe he's just a pretentious artist who is "trolling as an art form."
In a year he'll be giving lectures on the subject and old fart critics will think he's a genius.