Yeah, I could give two shits what people call each other on the street. But the workplace -- at least in the past -- is a different story.
But if you think about it, can you imagine a HR person (yes, I referred to an HR person as a human being) having to deal with that situation? If a Chinese guy or white guy says 'nygger' in the workplace -- automatic walking papers. But can you imagine an HR person trying to fire a black person for that? Lol.
And I guarantee you one of the black people would say to HR, "Well, we call each other nyggers all the time..." I guarantee you they would say that.
Anyways, I know for a fact managers and HR fear black people in the workplace... due to the simple fact that they can get away with so much and can't be disciplined.