There is no question that Obama is a Muslim.
His father was a Muslim, which makes him a Muslim.
His step-father was a Muslim, which also makes him a Muslim.
He went to school in Indonesia as a Muslim.
There is no evidence whatever that he was ever baptized, nor is there any evidence that he has ever been a Christian.
And as Obama has said, and has proven again and again, his sympathies are with the Muslims, while he hates Christians.
There is no doubt about it. None.
Even if he were a Muslim, the Constitution does not deny him the right to be POTUS, I think.