To straight people can have a gay baby. Two gay people can have a straight baby. We know these things to be true.

But again, because race is historical, two black people cannot make an Asian baby.

and to get to the second part. We live in a white supremacist society in which ones race has meaning, history, a lived experience, and material realities. I don't think transracial challenges the black/white "radicalization dynamic" in any way in that it's not challenging the white supremacist power structure of most of the world. So if one is "trans racial" and saying "I feel black" what is it that you're really saying that you feel? Again, I think you're putting race far too much into DNA and genetics and leaving out the history, which I would argue is the more important piece of it.