Your money quote which you seem to miss the implications of is here:
In other words, folks, Obama was not a British citizen at birth. Obama might have been born with no citizenship at all if he was born in Kenya. and not Hawaii.
If he has no citizenship at all, he cannot be a natural-born US citizen.
My personal thinking is that his birth certificate has a typo, which shows him either as a girl, or white.
He's too f***ing narcissistic to ever let a mistake of that sort see the light of day.
Under US law at the time, if his parents were not married, then he was a US citizen at birth. It's only if they were married, and their divorce papers say they were, and he was born outside the US, Kenya or Canada it doesn't matter, then he was not a citizen at birth at all, and would only be a citizen now if he was later naturalized. But if he was naturalized, or not a citizen, then he's not eligible.