The only person I recall talked to God was Moses. And he had been gone for 2000 years when Jesus was born.You don't think God gave them all a debriefing?Jesus was his son.....born 2000 years later.That they will worship no other god than the god of Abraham.What law is that?Then the idea of Jesus being god doesn't jibe with the law of Moses.Depends on which God Book you believe in.
In the New Testiment Jesus is God.
So of course Moses didn't know about him.