That's not only stupid, that's racist.
I'm a Christian too, and one of my best friends is a Muslim. Here's a surprise for you; she eats, sleeps, and laughs like any other human being. When she's sad, she cries. If you punch her in the face, she feels pain.
They're human beings, like you. Just because a few crazy fuckers decide to blow up a building doesn't mean that every Muslim is a terrorist. As a matter of fact, Islam is not even that far from Christianity, they follow the same line of prophets we do.
I wouldn't give a shit if Obama was a Muslim. He's not, but if he was, I could care less.