Sorry but there is no way you know Obama is not a Muslim. Only he and his wife know. You do not. He has a pattern though that leans towards that and not away from it.
Well,he may also be a homosexual and a tax cheater too so I concede the POSSIBILITY he could be a Muslim too.
So please find a picture of him at a mosque or quoting from The Koran to enhance the crediblity of the Muslim charge.