Bible literacy unconstitutional? So says Jake

Not that we really want to attribute meaning and substance to the things that Jake says, but this is rather amusing:

It’s clearly unconstitutional to teach a Jesus Bible-only class in a public school.

Well, we don't know what "Jesus Bible-only" means. He certainly plays the major role in the thing, but why is it "clearly unconstitutional"? Jake doesn't say--probably 'cuz it really isn't.