You’re clearly having a difficult time with the concept of Constitutional citizenship, granted by no inferior statutory or civil authority.
Other than a Cherokee or two and the matter of my great grandfather having to take the Oath Of Allegiance after the Civil War, I don’t have a single ancestor that wasn’t natural born all the way back to the founding generation which was covered by the so-called “Grandfather Clause.” All born on US soil of citizen parents, for the duration of this country’s existence.
Obama’s birth certificate proves nothing even if it’s genuine. His father was foreign, he was a citizen of another nation at birth, ergo he was not a natural born citizen of the United States because he was subject to another juridiction. This means he was not subject to the sole jurisdiction of the US.
That is not a true statement. Your "ergo" follows no known path of law.
Unless and until you have something that says otherwise, then being born on U.S. soil is sufficient. People born on U.S. Soil are citizens in every way shape or form. They can get a U.S. Passport just by showing their birth certificate and they can be drafted (should it come to it).
Your attempt at an "argument" fails on its face.
And makes us all look like loons.