An elementary truth claim of Christianity is that God is a “Person”. Not a thing. Not a principal of reason or intangible construct, and not a feeling.
But what does that mean?
We may smirk at the practice of people in the Bronze Age who constructed gods out of hand-made objects and worshiped them. This was the ubiquitous practice of the people in the Old Testament. We may (or may not) laugh at primitive people who worshiped the sun, moon, mountains and trees.
We are not much different from them, really, when we approach God as if God is an intellectual construct or feeling that we can conceive or conjure up. We are walking in the footsteps of our primitive ancestors when we see God as something indistinct from the universe. Our concepts may be more sophisticated, but only in degree.
The same is true when we view God as an abstract idea. An abstract idea, or ideal, is still a thing. Not a thing made of human hands, but a thing constructed by human intellect.
When we construct a god, whether by our hands or in our minds, or conceive of God as indistinct from the universe, we are not perceiving God in the way He is revealed in the Bible. These are “idols” that are poor substitutes for the Person of God.