That's true. You're also talking about a whole variety of pictures of Obama that don't necessarily show the same thing.
A picture of him in the same pose that Malcolm X was photographed in gets people thinking, but it's just one picture. A photo of Obama on the beach on a sunny day will be several shades lighter than a picture of him taken indoors.
But what stands out for me is that the shape of his head is more like that of an East or South African than of a West African, and most American Blacks are of West African ancestry.
So it looks more likely to me that he'd be the son of a Kenyan, than of an African-American. I don't see much of a resemblance between father and son, but you may find similarities if you look further in the family, recessive traits that would be more common in East Africans than in African-Americans.
Whether Obama is or isn't Obama Sr.'s son, I don't think experts would make much of the Davis or Malcolm X theories.
In any case, it’s less significant than the issue of the missing birth certificate. That’s the issue that matters. Is he a natural born citizen?
True, but I suspect what will come out of all of this is that his parents weren't married when he was born, or maybe even that his father wasn't his real birth father, not that he was born in Kenya.
Since there is no necessity that Obama’s BC be made public as it need only be reviewed by a judge there is much more there than mere embarassment. I suspect.