GOD is a theory.
But like all creation theories GOD falls at the first hurdle.
Something from nothing.
That is not the Christian belief. Someone necessary ALWAYS exists, no beginning, no end, unlike the universe and the many theories of origin.
That is a question for those who believe the universe is all there is. And what is the agency to make it go boom? And why would you look for reason in an unreasoning universe? You seem to put the cart before the horse way too often, IMO. But you find all kinds of reasons. Why should you if there is ultimately no reasoning agency behind anything???
As usual, time is your magic ingredient!!! Things just happen - no reason (as you give multiple reasons). MAGIC!!!
As usual, silence from the atheist "knowers" on such ultimate questions. Not even a cricket. Or would you like to speculate and surprise me? Without God you can't make ultimate sense of the universe or why we are here. God is necessary to make sense of it because I'm betting you can't.
Eternal existence is an easy answer.
But a magic bloke?
Or magical "time." Once upon a time, a long, long time ago. With time they magically think anything is possible. Meanwhile, from the atheist perspective, no one was around to observe the universe beginning and no one is able to repeat the process. Thus, they build all kinds of speculative models. And the greatest scientists are still nothing more than fallible, ignorant, impotent, powerless, speculators of what is and why it is. We only see and understand in part, not every link and every infinitesimal thing about anything. And what of the agency for the Big Bang or whatever theory they propose???
Are you proposing something always existed? If so, what was the agency that made it do what it did? Again, you a reasoning human being may come up with some kind of reason, yet how do you know it is true? Truth is the mainstay of science, not scientism, and that is what you are dealing with in beginnings.
The same goes for macro-evolution and the missing links. The prevailing opinion is we all originate from a common ancestor, rather than being created each to its own kind, yet we never see the links along the way. We just speculate about them and infer them because of similarity. You don't see them happening. Again, time is the magic ingredient, the fairy dust in the atheists bag of goodies.
Because a human being and an ape share 98% (or whatever) genetic make up/DNA structure we assume therefore that the one must have evolved from the other while dismissing that God just created us similar in so many ways to share a common/similar environment. And the prevailing scientific opinion gets drummed into our heads through the educational system. Thomas Kuhn wrote about our theories in The Structure of Scientific Revolutions, and their paradigm shifts. When the anomalies build up scientists jettison one theory for another until yet again the anomalies build up. What we thought we knew one hundred years ago has changed yet again.
Speaking of fanciful religions, Atheism is a fanciful magic religion were the atheist plays god declaring what is and what has been. At least the Christian has an ultimate source for his reason and being that can make sense of it, a necessary omniscient Being apart from him. You are not necessary for me to be or for me to form opinions and a knowledge base. Show me a human being who is necessary. I can make sense of my existence for I have what is necessary to do so. You do not. From ultimate eternal Being comes contingent beings! From an ultimate, omniscient, logical reasoning Mind comes other contingent reasoning minds! Reason comes from the reasoning God and He has revealed, thus (providing His existence and revelation) we have what is necessary for certainty. Logic is only possible with beings. Without logic we could not make sense of anything. Without Him, the ultimate Being, make sense of anything ultimately. You have to keep falling back on Him to make sense of things. "It just happens" does not make sense of anything. It is a tautology.