
There are examples where black history has been erased. My favorite is Great Zimbabwe. It was a medieval city in modern day Zimbabwe (what the country is named after). British and then Rhodesian white supremacist pseudohistory attempted to portray it as being created by Arabs, Egyptians, or phonecians to deny the capacity of local indigenous Africans to make great construction.
But this idea was disproven by evidence. Archaeological workers like David Randall-MacIver and Gertrude Caton Thompson (both white) conclusively proved it was created by local Shona peoples through the discovery of distinctive local pottery and metalworking. See, that’s the distinction. Evidence. The evidence showed great Zimbabwe was made by bantu peoples. The evidence also conclusively shows the ancient Israelites were local Levantines.
The portrayal of Africa as isolated from the rest of the world and from there being some sort of “species purity” is untrue. Populations migrated out of Africa and also back into it. For example, speakers of Chadic languages around Lake Chad are party of the y genetic haplogroup R1b, which originated in Europe. It’s likely that during the green Sahara period, around 6,000 years ago, a European descended population migrated to lake Chad and mixed with the local peoples.
While it was originally thought that Neanderthals were the only instance of us hybridizing with other human species, further evidence has shown there were many more hybridization events, several within Africa itself. https://pmc.ncbi.nlm.nih.gov/articles/PMC3174671/ https://pmc.ncbi.nlm.nih.gov/articles/PMC3426505/