I'm not really into the whole "lulz I can prove God exists lulz" thing, but this idea has been in my hand for a few weeks and I need to try it out, as I can't find anything about it, anywhere.
In physics, there are several theories that just blow your mind away. Two of these theories snagged my interest. The first is the Many-Worlds Theory, which basically says that multiple timelines (and thus, universes) exist at the same time, so every possible branch of history is played out (for example, in one universe, I rule the world, and in another, I'm broke and homeless).
Another theory is the Multiverse theory, which states that basically our universe is but one of many, possibly infinite, universes that either exist at the same time or are created and destroyed in a linear format (a universe begins, dies, then another universe begins, dies, and on and on) throughout eternity. Under the multiverse hypothesis a creator is unnecessary (it is for this reason that Richard Dawkins is particularly fond of the theory) and time is potentially limitless.
Now, I don't mean to go all mind-destruction on you, and I could be wrong, but if either of these theories is correct, I think atheism is inevitably and completely false.
Under the many worlds theory, there are an infinite number of alternate timelines that play out every possible course of history. Under this theory, unicorns evolved along with dragons, technology was never invented, and Al Gore won the 2000 Presidential election. This also means that there is a timeline where God, of some and all forms, does exist.
Under the multiverse theory, time is potentially limitless. There are many, perhaps billions upon billions, of universes just as big as ours, and when a universe dies, another one can take its place. If time is limitless, then the possibilities for something, anything, ever happening at any point in time becomes 1. This means that somday, perhaps billions of years in the future, an exact clone of Adolf Hitler will be riding a unicycle completely naked while juggling fish on the Moon. Since the possibility of anything happening becomes guaranteed, God must exist at some point in time.
Now, since atheism is the belief that no gods have ever existed or ever will exist, these two theories that pretty much guarantee God's existence are a bit of thorn in the side of atheism.
One potential hole in my idea is that under these premises, any god of any type can exist. Thor, Zeus, Jesus, Allah, Shiva, the monkey-god that punishes evildoers by flinging fecal matter at them, any and all deities, thought up or not, exist. But in effect I don't see much wrong with that, until we get to the next objection:
It is guaranteed that there is a universe (maybe even ours) where no god exists or develops.
This is where things get truly mind-boggling. If any god of any type can exist, then at some point a god with the omnipresence characteristic will emerge. Theoretically, a deity that can be at all places at all times can also be in all universes and all timelines at the same time, which would include any atheistic universes.
This means that any deities that do not have the omnipresence factor can remain only in their respective universes/timelines/dimensions/whatever, but an omnipresent deity can traverse all boundaries and be in every universe at the same exact time (this may also be congruent with a third physical theory, quantum entanglement).
The implications of this idea are as follows:
All religions are inevitably correct, as well as religions that have never even been thought up.
Any religion that theorizes an omnipresent deity is correct in this universe as well as all others.
Atheism cannot be correct in any universe as an omnipresent deity can be in all universes, thus making atheism a false belief even in a universe where no deity actually develops.
Agnosticism can be both true and false, since an agnostic simply does not know whether a god does or does not exist, but either believes in favor of theism or atheism.
The idea also filled with logical paradoxes. There is a super-deity that can kill all other deities, and there is a deity than cannot be killed by any other deity.
If an omnipresent god exists at one point in time, it exists at all points in time. If an omnipresent god exists ten billion years in the future, it also exists in the here-and-now.
So to say the least, it's mind-blowing. It also hinges on the truth of one of the above theories, which, none of them have been proven and it may not even be possible to prove them.
It could also be a bunch of bullcrap, seeing as how wrapping one's mind around all of that infinite information is impossible.
But yeah, I don't like trying to prove God exists. That's not my thing.