Not sure I understand your point.
My comment was directed at the politically correct ideal that ALL modern humans can be traced back in a direct line to ancestors in sub-Saharan Africa.
Thus, according to that ideal, any form of racial prejudice or racial conceit is evil and ignorant because we all have the same ancestors.
But, if some of us uniquely carry DNA from other human species, then that ideal goes right out the window.
In a general sense I think I understand what you are saying - that the southern Africans are still my “relatives.”
I agree, but I’m also a DNA “relative” of 3 billion year old bacteria, but I’m not sure that fact helps us in the present discussion.
There is nothing PC about it.
Neanderthals also originated in Africa. While there is more to be learned and discovered than what we actually know right now, there is no evidence of a humanoid species of non-African origin. Applying any modern day ‘racial’ component to evolution would be pc nonsense. DNA doesn’t care about political correctness.