Fine with me. It's an offensive term and GitHub has every right to police their service and ban content like this. Am I supposed to be concerned by this, and if so, why?
Yes, you should be. The problem is that people (perhaps you) are elevating something marginally offensive to something hateful and worth shutting down at all costs. The dragging down of minor offenses to serious offenses is a dangerous thing. It's surprising how little intellectual honesty there is in modern society. It's even more surprising here that some people (perhaps you) are willing to abandon any rational thi…
This sort of censorship/filter/whatever-you-call-it is bad because it add way too much value to words. So it's not about what is actually said or the context but only about words.
By that logic it's completely PC if someone is actually offended but in such a way that no bad words are used. But as soon as a Bad Word (TM) is used -- bam.
This is really really dishonest, shallow, and disgusting.