Nowadays, it's like one is walking on eggshells all the time thanks to the PC (Politically Correct) society that we live in. Whether it be at our jobs, academia, or in a public space there are certain words that illicit a pavlovian response out of people, thus resulting in punishment for daring to use said 'forbidden' words like 'nigga' or any other word that can offend someone. Unfortunately for this guy, he was made an example of by his employers and will no doubt be denigrated in the media for some time.
Just goes to show you, can't entirely trust that the person receiving your message won't report you for using language that seems in any way offensive to them. A lot of people seem to get off on hyperbole, just ignore them and don't choose to self-censor your words just to please someone else's expectations of what constitutes as 'proper language.' Someone may argue that because he's in a position of power he should take heed of his words in order to not inflame certain minorities, but if that's the case then we should hold everyone to the same standards. It irks me when I hear when someone gets mad because someone uses an 'offensive' word against them, but at the same time turns around and calls their peers by the same 'offensive' word. In conclusion, nothing to see here folks, just another example of how topsy-turvy this world is.