Obama Senior was half-black, half Arab Muslim. Arabs three hundred years ago sold Blacks into slavery.
Also, about that time white people on this continent were buying slaves.
So there you have it. Obama is descendant from people that sold people into slavery and bought slaves.
So how come he gets black support? (rhetorical)
Arabs are still selling blacks into slavery. Arabs also have investments in at least 5 of the 6 TV networks in America. You know TV with all the “stupid white man” commercials.