How can you say God is fiction if you do not know who God is?
I assume your god is similar to his.
That's where you cult members get confused - you think your reality applies to other people and even God.
Man's distortions do not qualify as definitions...
God defines himself in Exodus when the burning bush speaks to Moses.
What does God actually mean by that?
With luck, you can find a path or religion that explains it in detail.