Listen bunk the First Amendment gives everyone the right to say what they want and use any word they want and that includes the n word. So take your political correctness and shove it up your ass sideways!
Let's establish some parameters here. First, RJ is a privately-owned site, to which we belong by choice. Accepting the membership terms when we join. We do NOT have broad US Constitutional free speech rights under the First Amendment on RJ. The site owners set the rules. If you don't like that, try another site. Where you'll likely find the same thing.
Second, the US Supreme Court has established limits on "free" speech. Falsely yelling "FIRE!" in a theatre is often used as a classic example. You also can't maliciously slander someone, and be exempt on a claim of free speech.
Plus certain forms of hate speech are also prohibited. Everyone does NOT have the right to say anything they want, and use any words they want, if it involves hate speech. It's not a matter of political correctness, but of statutes and case law.