[hackuser]

The meaning of speech depends on context, always. If I say something by myself, in the privacy of my home, it's much different than if I say the same thing with a microphone to an angry mob. Yelling "fire" when a building is on fire is different than yelling it in a crowded theater where there is none (a classic example from law).

Similarly, if a white person publicly says something discriminatory against black people, it's a much different context than if a black person says the same thing. As an simple example, imagine a two black people in a room of 40 white nationalists: If one black person says to another, "hey n-!", that's much different for the person hearing it than if one of the white nationalists says the same thing.

There's a lot more to that word, including black people taking power for themselves and away from racists by using it (really a brilliant, innovative way to push back), but that's too much to write here and now.