Ok...Thats not your call to make. Not being allowed to use racial slurs does not mean you are being discriminated against. It means you are being told to behave like a decent human being.
If your first reaction to being told "Hey don't use this racial slur" is "WHAT DO YOU MEAN I CAN'T USE A RACIAL SLUR OMG WHAT IS THIS DISCRIMINATION?!??!!?" then you need to take about 300 steps back and re-evaluate where you went wrong.
First of all you can not tell me anything what I am not allowed to. Or are you the law? Secondly I do not know HOW many times I have quote the definition of discrimination again. If you want to discriminate against people be my guest but be honest about it. I am white so I can not say it. thats discrimination. And as I said before you can not tell me anything I do not have to obey you and the more you want to pressure and force me the more and often do I say it. while I still being polite to people who treat me on the same level.
Secondly: Nigga is no racial slur anymore. Again words change. Nigga is being used in media every day it is pretty common word under teens as well these days. You and ANYONE else does not own words. As much as you want to believe this but this is not how words and language work. If we are talking about the hard R I agree and I will say NO ONE should ever say it. And you do not get a R free card because you are black.