I think it started because of Wakanda, as hilarious as that is.
The we wuz kangz thing is a reference to their mistaken belief that ancient Egyptians were sub saharan Africans. Also hilarious.
What ppl struggle to understand is that there is a geographical boundary running east west separating upper Nile from lower.
Egyptians were largely geographically isolated from the vast majority of Africans
It predates that by a lot. It started with Jews telling them they once ruled Egypt. So they believed they were all from kings of Egypt, having built the Great Pyramids and so on. In reality, blacks invaded Egypt and displaced whites. Egypt was turned from fertile lands into deserts. They chased out and killed all the whites. What's left is what you see.
Genetics confirm whites were the original Egyptians and pharaohs.
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