Moses was looking at an angel sent from God.No opinion just scripture and the truth it teaches us.
And the Angel of the LORD appeared to him in a flame of fire from the midst of a bush. So he looked, and behold, the bush was burning with fire, but the bush was not consumed. Exodus 3:2
Who was Moses looking at?
That is not Exodus 3:2.Moreover He said, “I am the God of your father—the God of Abraham, the God of Isaac, and the God of Jacob.” And Moses hid his face, for he was afraid to look upon God. Exodus 3:2
Find the right scripture.The scripture plainly says Moses was afraid to look upon God.
If the angel was God, why didn't Manoah die ?The scripture plainly says the same thing in Judges -
Then Manoah said to the Angel of the LORD, “What is Your name, that when Your words come to pass we may honor You?”
And the Angel of the LORD said to him, “Why do you ask My name, seeing it is wonderful?”
So Manoah took the young goat with the grain offering, and offered it upon the rock to the LORD. And He did a wondrous thing while Manoah and his wife looked on— it happened as the flame went up toward heaven from the altar—the Angel of the LORD ascended in the flame of the altar! When Manoah and his wife saw this, they fell on their faces to the ground. When the Angel of the LORD appeared no more to Manoah and his wife, then Manoah knew that He was the Angel of the LORD.
And Manoah said to his wife, “We shall surely die, because we have seen God!” Judges 13:17-22.
Manoah and wife were mistaken.