The Bible states that no one can see God's face and live. In other words if you see God you will die. So just so Moses wouldn't die when he wanted to see God, turned so all Moses saw was God's backside. Think of that for a moment. If Jesus was God, how come they didn't die like how God went to great lengths to ensure that Moses only saw his backside.
Like Jesus said when the man addressed him as Good, he told him don't call me good because the only one good is God.