In order to be even remotely historically accurate to past (and present) black cultures, you necessarily must depict them in a universally damning light. If you instead rewrite history in an attempt to depict such cultures as good or beautiful or functional, then you must engage in a level of dishonesty so blatant that it immediately invalidates your own worldview.

The far better tactic is to brazenly inject blacks, pretty much at random, into highly successful and beautiful non-black cultures. It’s like a racial version of stolen valor that uses the inherent fog of history as plausible deniability for rampant and malicious revisionism. “You can’t prove that there weren’t some black people in such and such white country at such and such ancient time, therefore black people were possibly at the center of everything”.

Of course, those black men and women - who were totally equal participants and contributors in all of the important and powerful non-black cultures throughout history - magically did not participate in any of the bad behaviors that leftists point to when decrying those same cultures problematic. All successful non-black cultures are trapped in a superstate of being irredeemably racist while also having been secretly built and piloted by morally perfect black people (whose contributions were totally erased from history by the bad guys, but also history is totally accurate with respect to other events because reasons).

It boils down to activist demons capturing and torturing history in order to advance their eternal agenda in the present day.