Are you just saying, everything is real in some possible universe?

No, I'm saying that God is real in this universe.

More to the point, I'm saying that as a human, God is real in the whole omniverse. This is very similar to how torture is bad and wrong in the whole omniverse. That statement is a value judgement, not just an objective, propositional, observer-independent, agent-independent, canonical, non-contingent, speaker-independent, non-indexical fact.