Ah, ok. I have no idea. I reacted to "It immediately reminded me of Jemisin's "The Fifth Season", because that's pretty much the central plot device there: people with dangerous magical powers being discriminated against, out of fear, in ways that directly and obviously parallel racial discrimination of blacks in real world USA." in parent. The description that made him think of fifth season does not sounds like fifth season either.

I did not read "Blood Heir" and don't know anything specific except seeing some tweets about about the issue. All those tweets were from people with strong agendas (both ways agendas but still not fully trustworthy in their analysis). Which is why I don't want to speculate on its content.