I disagree with you. A person’s self-perception of allegience due to parental ties is stronger than genetic unknowns.
Something going on in California
In Obama's case, he didn't know either father. Any ties with the Kenyan are imaginary and illusory. He had no real contact with him. That is not saying they didn't have real effects on his psychology. If Davis was his actual father, he had more actual shaping of his allegiance by Davis than he did by Barack Sr. The Fact that Davis was a Communist who hated America simply yields the same result as if Barry had been raised by a third world father to behave the same way.
Barack's adherence to his "Kenyan" persona is a form of absent hero worship. His absent father could have been a cowboy or an astronaut and it would have achieved a similar result.
Blood tells who is the real father.