The God known by Noah was obviously known in the world of that time as the supreme God. Genesis does not try to introduce the reader to which God is the top God because that was common knowledge. Religions have all inherited more or less of that original unambiguous clarity. Yet it was clouded. Look at how the Greeks had some clarity of Zeus being the top God, but then there was clouding of it by claims that Zeus was a son of a Father God. So then it is a question if Zeus or Chronos is top God. Until mythology killed off Chronos. By the time the Christ came, that original clarity in Noah’s time had been clouded. It happened to Noah’s people too. They identified several top gods of whom there was a Father God but this got clouded by different beliefs about which god was top God. So Jesus had a job to do. To clear it up and present the true Top God, the Father, initially as someone unknown to all but Jesus, then gradually revealed through Jesus.
