The objection: "if there is no God and there is a being who knows everything, then this being would know that God does NOT exist." is absurd, because if I know everything, then I am God. I begin with the situation, where God is existent. Then this situation becomes proven (becomes the only situation possible). If there would be God, then He knows about Himself. Thus, there is knowledge of God for us to find. Therefore the God exists.
The total proof of all that is divine and/or invisible:
Dark Matter as Simulation of E.Musk