On the "Black Africans Were Actually the Real Ancient Egyptians" Afrocentric Theory

I want you to think good and hard as to what these folks (Al Sharpton amongst them) are suggesting here. They are asserting that sub-Saharan Black Africans migrated north, created one of the greatest civilizations known to man, and then ended up back in Central Africa where they ditched all of this culture and knowledge and replaced it with primitivism (they didn't have the wheel, for Christ), tribalism, cannibalism, voodoo, and barely eking out an existence. It's an absurdity and it needs to be ridiculed. YES, ridiculed.