Every once in a while, a Christian (or some other kind of theist) has to think and talk like a Christian (or some other kind of theist).
This engages the whole Universe of disciplines and studies.
A scientist who is a Christian doesn’t have to say “God did it”, to believe “God did it”.
So, this sentence you have contrived: “It’s bad science to say God … [etc. etc]” is rather beyond the point. This is what makes I.D. proponents so vulnerable. They attempt to make a Scientific statement with the word God in it.
Christians who accept Evolution are more like Behe: they don’t have to say that God did or didn’t do something… he just knows. But unlike Behe, most Christians do not try to change science with that knowledge.