And if anyone other than Barack Sr is his father then the man committed a Felony/fraud by listing BO sr. as the father on the released Certification of live birth.”
That’s only the tip of the iceberg of fraud committed.
That assumes that Barry, jr., knows who his father is.
Maybe the Dunhams didn't want to let Frank M Davis into the family (for which there are a number of possible reasons), so they just "assigned" him to the far away foreigner because while still a bit messy, it was much easier to deal with. Think of the internal family dynamics when Grandpa's drinking pal (which is what Dreams explicitly says he was), gets the daughter pregnant. Big family crisis. Lots of embarrassment, followed by "Hey Frank, how about you move back to Chicago?"