You’re right, he’s not a Christian...but, I’ve heard no evidence he’s been on a pilgrimage to Mecca or prays 5 times a day either.
I’m firmly convinced that Obama’s only religion is named...Obama.
There are Jews who eat bacon cheeseburgers. That doesn't mean they aren't Jews anymore. There are secular Muslims just like there are secular Jews. Obama was born a Muslim. That is a fact. His father may not have been a practicing Muslim, but he was a Muslim nonetheless. That makes Obama a Muslim unless and until he actually renounces the faith.
I don't have any evidence that he has. If he had actually renounced Islam, then I don't think he would have such a great following in Islamic Countries and I don't think he would have been granted an audience with King Faud (so that he could bow before him).