All that we know of God is what people have said about their experience of God from the first person who experienced what they called God through all of the people who experienced what other people described as their experience of what they thought of as God. And all of this comes down to people throughout history talking about their ideal of God. So that all we know of God comes down to the ideas of God that people have had throughout time. So God comes down to what people have thought about God from here all the way back to what the first person who thought about God thought about God.

God is ideas about God. What somebody said about God. What everybody has said about God. God is a fiction created by people who shared their ideas of God with other people who had had ideas of God.

This includes everything that is in the Bible, which is a record of what people thought of God, of what people thought was God, through time.

The same thing can be said of the Fairy God Mother. There is as much evidence, proof, truth of the Fairy God Mother as there is of God.