@aaaaa it’s still the god of Abraham, Jesus claims to be son of that same god/that same god. By the way there were two councils just about trinity and it’s interrelations and still not all Christians don’t agree on it. You can’t take Bible as a historical document literately (or even at all as a document). That was a young religion in a huge Empire, the Roman empire, many historians think that early Christians deliberately made Romans look innocent so their sect could spread more easily through the Empire and they members wouldn’t oppose the Romans so much.