Where does the "Africans are the only real Jews" theory come from and does it have a factual base to stand on?

by ineedtoremeber

I've always lumped them in with the crazies but I've seen it popping up a bit recently among people I thought had at least a few of their marbles in place. Are they crazy or what?

TheOneFreeEngineer

It might be helpful if you provide a link or something to the claim because it be referring to the Black Hebrew movement, or Beta Israel, or some other thing and each one would require its own explanation