By your logic "[s]ince he claims that the Kenyan was his father, he was born a Kenyan", shall we all just grant him NBC status, too?
He was already granted that by both parties, they both wanted the protections of the natural born citizen clause neutered so they could both run ineligible candidates.
In 2016 we saw Jindal, Cruz and Rubio run while ineligible.
BTW, Barry never publicly claimed to be a natural born citizen.
He said he was native born, meaning he was born here, which may or may not be true, but does not make him a natural born citizen.
Nancy Pelosi only certified him as a natural born citizen to Hawaii, she left off that language to every other state when filing in 2008.