You are correct the issue of where the birth took place in US is irrelevant, if indeed he was born in the US. However, the later fact of Obama being adopted by Soetero would have made Obama an Indonesian under their law, and stripped Obama of any previous citizenship. Either way, he is not a natural born US citizen and shouldn’t be President.
I believe the article was making the case for the possibility that Obama’s father was Malcolm X.
So you believe that a foreign country can strip a US citizen of their citizenship?
That's not correct. You can only lose your US citizenship by taking active steps to do so. Simply applying for the citizenship of another country (or having your parents apply for it on your behalf) isn't enough. You have to voluntarily renounce your citizenship in front of a US official. There is no evidence that The One ever renounced his US citizenship, so his status as an Indonesian citizen is irrelevant.