So you are admitting that there is no proof of God? If there is no proof of God that no one can show me, then why should any reasonable person believe in something that has no proof to validate its existence?
If, as you say, there is plenty of evidence that points to God, but no concrete proof, then the evidence is by definition weak, and insufficient.
Trying to approach the question by looking for deductive proof of God's existence or biographical details of Jesus' life is a fool's errand, but we don't have to do that to prove the Bible is simply not credible, because we can find places where it contradicts itself and what we know of history or makes claims that are demonstrably false.
This is going to be a long post so, bear with me for a bit, because it's going to take a little time to show what a house of cards this is. I promise I won't be exhaustive, but most people don't really understand the textual history or literary context of the Bible and we need to work out way up.
I grew up religious, and they always tell you that tanach (5 books of Moses) was dictated word for word to Moses and handed down ever since. And that the whole of Torah has remained stable. But the truth is that it's been anything but. The earliest surviving copies of the old testament date to around 1000 years after the supposed exodus, and this version is quite different, full of books that are now considered apocryphal. The old testament wasn't canonized until the first century AD, some 1300 years after the time Moses supposedly lived.
What that means, in short, is that a bunch of priests in the first century looked at a collection of books, written in different languages and at different times and said "Hey, do you really believe all this crap?" And they went "Eh, like maybe 2/3 of it."
So now we're basically deferring to the judgement of a bunch of rabbis in the year 80 AD to sift through this stuff. And you could try make some silly argument that they were divinely guided or happened to get it all right, except we know they didn't.
Let's start with the book of Daniel. The book of Daniel is a second century BC apocalypse -- which contrary to its vernacular usage, refers to a literary form where someone writes a history framed as prophecy attributed to an older source, usually followed by a prediction for the future. These texts were very popular in the first and second century because it was a time of tumult and they framed history as having a plan or purpose.
Anyway, Daniel can be conclusively understood to be this sort of pseudigraphy/forgery. In addition to being written in a newer form of Hebrew rather than the Old Hebrew spoken in the 6th century BC when it claims to be dated, it has many errors. It tells a whole story about Nebuchadnezzar's conversion that, in real history, happen to Nabonidas, including naming family of Nabonidas by name. It also incorrectly references details of Bathazar's death, confused Darius I with Darius the Mede, etc. Like most apocalypses it tends to be vague in the earlier parts and get more.accuratr and detailed later on (because it is actually written in retrospect and more recent history would be better know) and then lead into a final prophecy that never happens. It is very, very clearly not a divinely inspired work.
So if we cannot trust the canonization of the Sanhedrin, then that means we cannot inherently assume any of these works to be true simply by virtue of the inclusion. Now, what of the five books given to Moses at he supposedly received at the covenant?
Well Genesis/Breshit is pretty problematic. There are some small contradictions that are easy to spot. There are a lot of "double tellings" where it tells the same story twice in different language with different details, suggesting it the text was an attempt to harmonize multiple sources (there are other tellings of these stories that did not make the cut to canonization as well, such as the Genesis Apocryohon). The most of these being the flood for 40 days or 150 days. (I am aware there are some clumsy attempts to handwave the latter away as referring to the receding if the flood but this two is contradicted by the details.)
Now the biggest and most obvious problem with Genesis is, of course, the fact that the flood story is plagiarized in entirety from the Ut Napishtim's story in the Epic of Gilgamesh. Like down to pretty specific details. Gilgamesh is of course a fictional and much older work. And that connection isn't alone or isolated, Gilgamesh is actually referenced by name in the apocryphal Book of Giants, for example. There are also weird holes in Genesis where stuff was taken out like the strange and poorly dephined nephilim, who are better explained in apocrypha like the Boom of Giants or the Book of Enoch (the latter of which is cannon in Ethiopian traditions and not in others).
And there are a ton of other similar, if smaller plagiarisms like this. Lines and laws taken from the codes of Ur-Nammu and Hammurabi, the story of Moses in the reed basket taken from a pseudepigraphal autobiography of Sargon of Akkad, etc.
Anyway, I could go on and all day about this, textual history of the Bible is something I have read quite a lot about, but at this point I think it's important to note how much even a few cracks in the facade reframe how we consider the rest.
Because it's important to weigh the reliability of a source against the plausibility of its claims. Ancient history isn't always super reliable but when multiple source corroborate relatively believable claims we tend to accept them, and when a source makes a more extreme claim that conflicts with other sources, we better be quite sure of the reliability of that source if we're going to take it at face value.
So when a book talks about magic, and dieties and major historical events that have no historical corroboration, and which is contradicted by everything we know about the physical world, science, and the geographical record, we better be damn sure that source is reliable.
And it isn't. We know for a fact some of it made up and no one really knows exactly how much (spoiler alert: all of it). And there are tons of other texts just like it, and the only reason we pay this particular collection of texts credits is because a bunch of fallible humans in the Sanhedrin and Council of Nicea said so. There's no particular reason to think that any of these texts are any different than any of the apocrypha and contemporary religious texts that we understand to be false.
All cultures have religion based values. including Hindu/Buddhist. Atheism is a momentary phase that cultures keep rebounding from.
I think humans have a natural tendency to frame the world in terms of higher purpose, sure, but that doesn't make any of those religions true. I was a religion minor in school, and you study enough of that and you realize it has more to teach you about people than God.
Interestingly China is the one place that kind of got that. Ancient Chinese religion was generally seen as a way that societies can get people to act right rather than as speaking of any meteohysical truth.