You know it, so stop lying.
Your photos don't provide any compelling evidence that Mark is more Barack Sr.'s son than Barack II is. They could be father and son, but there's no smoking gun there, no obvious indication that they would have to be, or that they were especially likely to be.
I don't know what your theory is, but if it's the Malcolm X one, it's obviously wrong, and insulting to the intelligence in so many ways.
First, cross-racial identifications are always tricky. People fixate on the obvious similarities between people of a different race and don't see the subtler differences.
Second, people are stupefied by the way that one picture of a head of a certain shape and size taken from a certain angle can be morphed into another picture of a head of a similar shape and size taken from the same angle. It's like cats captivated by shiny objects. They aren't examining other likenesses of the two men.
Third, of course a mixed race child may resemble other mixed race people more than the parent of one race or the other. The particular racial characteristics get lost in the mixed. You could as well say that Obama couldn't be Stanley Ann's child because he didn't look much like her.
Fourth, how does an East Coast African-American religious-separatist leader and a White Seattle school girl get together? And why? Surely each of them had more likely and appealing prospects closer to home. People are fixating on Malcolm because he's a well known figure and Obama's imitated him to a degree and letting common sense and probability go out the window.
If you've got some other theory, good for you, but don't give support to a particularly silly one.