OK, have to step in here. The map is not the territory, and the idea of a thing is not a thing. If you are saying "God is not a thing, it is an idea" I'd agree with you. But ideas are not in any necessary one-to-one correspondence with the Universe of "things that actually exist", and ideas to the very best of our experience a) are highly complex phenomena contingent on all sorts of material stuff and do not just float around like quantum particles that permeate and surround the Universe (h/t to Terry Pratchett); b) cannot and do not "create" anything, ever. In fact there is no evidence that anything, ever, has been created. The laws of physics are all pretty much constrained by conservation principles (consistent with observation) that state that nothing is ever created, it is all just existing stuff changing form and moving around.
The second thing I'd object to is the idea that anyone at all can "reason" about God in a meaningful or useful way. The first step in such a reasoning process is to choose one's premises, or axioms, or postulates -- the basis for one's eventual "consistent" conclusions. This is precisely the same whether one is reasoning about mathematics, the Universe of stuff that actually exists, or the enormous metaphysical space of pure speculation -- reasoning about pink unicorns, trying to decide if Santa likes hot chocolate with or without a splash of peppermint Schnapps on Christmas eve, how many angels can dance on the head of a standard shirt-packing pin. The premises themselves cannot be proven -- they are PREMISES -- so all reasoning contingent upon the premises is Bullshit in the precise sense that there is (as noted) no necessary one-to-one correspondence with the pattern of consistent results on derives with the very best of intentions and the real world.
The second step in USEFUL reasoning is to seek out objective correspondences between those contingent results AND the real world. To the extent that they are discovered to exist, we strengthen our degree of belief in the conclusions, and by Bayesian reasoning, the premises that led to the conclusions in good correspondence. To the extent that they are contradicted, we at least weaken our degree of belief in the conclusions, and again by inheritance in the premises that led to the contradiction. This is a slight oversimplification as multiple premises contribute to most nontrivial conclusions and it is not necessarily clear which one(s) fail, but there is no doubt that REASON requires reduction of belief in the conclusion itself rather than amplification when there is either no evidence supporting it (but there is evidence supporting competing ideas and arguments) or if the evidence contradicts it.
And here's the rub. The very first step about any reasoning process about God has to begin with the pure assertion that God exists. This is because we have no direct and usable sensory data, no direct "experience" of God the way we have experience of toast, or things falling down when dropped. We have built powerful apparatus that extends the range and sensitivity of our senses and none of it reveals God. We have conducted careful statistical analyses of human experience contingent on things like belief and prayer and behavior and -- outside of obvious stuff that behaving "well" is more likely to make one happy than being a butt in human society -- no phenomena or statistical anomalies are observed that require supernatural explanation. One cannot predict one single thing about the world and how it behaves or outcomes based on religious belief or the asserted premise "God exists for some useful meaning of the word `exists'". To paraphrase, the rain falls on Saint and Sinner alike.
What we CAN do is examine the consequences of BELIEF ITSELF. Believing in something has an enormous impact on human existence. In a sense, our society (or societies!) are defined by their beliefs, their memetic structure, their history, their evolution -- including religious beliefs. Religious beliefs make an enormous set of untestable, empirically unsupportable assertions, assertions that are blatently internally inconsistent. Contradictions abound. One can, as everybody SHOULD know, "reason" your way to any conclusion you like from contradictory premises, so it comes as no real surprise that humans are constantly manipulated and manipulate others on the basis of these absurd contradictory beliefs. Since all major religions assert a special exception for ordinary reasoning processes when it comes to reasoning about the religions themselves as a necessary step in getting people to continue to believe in the absurdity, they persist, and humans who accept them make monumentally poor decisions, choices that they would never make if they were actually reasoning correctly and optimally in and about the real world.
Religion is arguably the number one killer of humans active on the planet at this very moment. It is directly responsible for some of the largest and longest running armed conflicts in our mutual history. It enslaves and distorts the judgment of some 3/4 of the human population -- literally enslaves perhaps a billion women in the Abrahamic faiths. It causes the redirection of a huge fraction of the global production of the human species into the "service" of the priesthood(s) of the various religions, who spend most of it supporting themselves without an actual job that actually produces something useful, like toast or Schnapps flavored hot chocolate. The religions that persist after a brutal memetic evolution process involving world conquest and domination at the point of a sword are almost without exception socially engineered at this point to make the poor and disadvantaged human content enough with their lot to avoid revolution against the prevailing powers that keep them poor and disadvantaged by promising them eternal pleasures in an imaginary afterlife if only they behave themselves and are good little proles in this one.
Sure, this too is an oversimplification -- some people, in some religions, also do some good things. But that is more because they are good people than because the religion itself is good, and good or not it isn't likely to be TRUE. Reasoning from FALSE premises isn't all that great a thing to do, or to base a sane society on.