For example, just as the angels in the OT and NT appeared as men, or in a bodily form, they didn't actually get flesh. They looked as that way to humans so we could comprehend it.

Thanks. That makes more sense.

However the Greek lexicon I am looking at seems to imply that bodily can also mean corporeal. So that God took on a very corporeal form.

Also, God cannot commit idolatry. Your passage in Romans is saying if humans create these things that take forms of human, birds, etc and worship them as God.

Doesn't a danger emerge from God entering His own creation though? If God is made flesh as, or appears in the form of, his own creations (a man and a dove) doesn't this blur the firm distinction between God and His creation? And when the firm distinction is eroded men are oriented more towards the worship of creation because God Himself has appeared as such.