Sorry for belaboring the point;
In an attempt to put things in context, a hypothetical:
Let's imagine we are in a communal drinking well instead of an internet forum because we are only a few decades after the start of an oppressive European presence and classifying us darker pigmented people as BLACK because of an attempt to dehumanize and subjugate.
A few brothers walk into the area and we all overhear one them, in a jolly way, refer to all of us "Ahhh, my black people! How we doing today?"
Would we all have the same energy that we have now with respect to the word nikka?
There is NO point that would correctly be able to argue that BLACK in reference to all of us in that scenario started with any GOOD intention. As a matter of fact, we are clear that the classification of us as black has a very oppressive, violent and terrible history in its origin.
What would the perspective be?
Now, my point is that those who say nikka could NEVER be something that could be normalized by us but BLACK is something that was okay to be normalized and CELEBRATED, how does that logically make sense?