using the word nigga has become acceptable. I dont think that one will ever become removed. It's established and rooted itself within this current generation so much that hispanics call each other niggas. Basically alot of people try and use it. Yet even using that word if you're not black causes problems. I've seen it first hand and the reaction is always, 'if you can use it, why cant I?'
black comedians take advantage of the fact that they can sound funny with it and crowds seem to like it. Then it's also in hip-hop culture and such. So in that sense, I dont see that word going away anytime soon.
Now the other one is more clear cut and from where I'm from if you use that in any context it's unacceptable. When I see black comedians use it, I just shake my head. You get mad when someone else uses it but then you take liberty in using it as well. That's their approach and from my hometown, kids do the same thing. Makes the problem even more convoluted. That's why I wonder if it will ever disappear from society.