Certainly "God created it" is as good an explanation for how the universe started as anything science has (which is pretty much nothing), but, in my experience, ID proponents, or at least the ones who identify themselves as such, and specifically the ones pushing for ID in the classroom have a much larger idea than that of what ID is. Basically, they seem to say that God created every creature on Earth by hand and that evolution is nonsense. (I probably overstate, but that's the basic notion.)

I have no problem with there being objective religion classes in school, either, as long as they give fair share to all religions. In my mind, these would be sociology/anthropology/history classes, not religion classes. The notion that God created the universe would make sense there. But it has no place in a science class.