That's an interesting point. Sorry it took me a few posts to understand what you were getting at, but that's a clever interjection, and it does make sense to me.
Just because you see supernatural significance (as you call it, "undeniable evidence") in the world around you, however, doesn't mean everyone does. In fact, if there were so much undeniable evidence for the existence of god as you claim, we wouldn't be having this conversation because god would have been proven to exist. The difference here is that theists have proven unable to come up with an extremely convincing, undeniable proof of god's existence. That proof will never be offered. If it were, then the burden of proof would be on the atheists, because they have disbelief in something that has been proven to be true. As it stands, however, theists haven't definitively proven their position to be true, and until then nonbelievers don't have to prove anything.