> It's funny how White people use “black” with almost unlimited breadth right up until that challenges the original whiteness of territory they view as an ancestral homeland, and then immediately start demanding that the blackness be viewed maximally narrowly.

That’s a pretty impressive generalization. It’s also not very charitable to imply that people are being defensive about some sort of racial homeland instead of taking them at their word that they are skeptical of the wild conclusions that aren’t supported by the science.