...the fact that most Muslims consider him to be one of theirs by birth. I do not make rules for the followers of Islam,

That is very open to question. A number of very knowledgeable Islamic sharia jurists have judged that not to be the case.

Moreover the very assumption that Barack's father was a Muslim is also open to question. Auma Obama,one of Barack's half sisters: ""His [Barack's] father was never a Muslim although he was born into a Muslim family with a Muslim name." From a Guardian writer who has been meeting with members of Obama's family