As I've said elsewhere, I'm agnostic. I believe it is possible that there may be some creature, force, etc that is not well understood by humans and would be considered god-like in it's intelligence/power by comparison, somewhere in the universe. If you believe some theorists on the size and distribution of the universe, it is practically a certainty.
However, I am completely convinced that whatever religions humanity has deluded itself with throughout it's existence are nothing more than reflections of our own collective psyche. If there is a "god", or vastly superior being, it is nothing like what any of the Abrahamic books would have us believe. Or any of the thousands of other religions that used to dominate the world for tens of thousands of years before the jewish religion even existed, or the hundreds of others that exist concurently with it, all with deeply contradictory beliefs.
Truth is not a popularity contest. Abrahamic religions are a large portion of believers on the world because of history, because they were inextricably linked to conquest and trade and governance. Like any other religion their primary goal is almost organic, to survive, replicate and spread as far as possible. Organized religions have been around since the dawn of civilization, and probably long before that. They are a survival feature, a more inclusive form of tribalism. Another marker to determine who is friend and foe, who is person and who is unperson. Nothing more than an evolutionary addaptation on the group level. Just because certain of them are more successful than others gives them no inherent truth. If you lived 3000 years ago in, say, a greek city-state, just because everyone else believes in the same cultural myths and legends, would that make them true? After all, their "experiences" all agree. Ergo, they are true? Just switch that for literally every single religion that has ever existed, completely tied to the cultural zeitgeist of it's surroundings, and you start to see how ridiculous the claim is. Belief=/=reality, no matter how much you think it should.