There's a theory for this kind of stuff. People don't believe in any kind of higher power mainly because of scientific influences within society nowadays - that was a big reason for the shift towards atheism/agnosticism in more recent years. There's more people trying to disprove religion than there are trying to prove it, yet people seem to think this is because religious cultures don't have a concrete ground to stand on when it comes to their faith. The actual reason is mainly because of religious literature teaching the followers that they don't have to prove themselves in many ways.
I think a lot of non-religious people are just plain rude. The majority of religious people I know nowadays are living happy lives and generally being contented with what they do, not poking their nose in anyone else's business. However, the non-religious type constantly put themselves out of their way to try and prove the non-existence of a higher power. It makes me wonder who they're trying to convince. And everytime I make a comment like this the typical response is usually "no, we're just trying to make them understand". Understand what? That you don't have a clue about the majority of religions yet you're basing your facts on opinions of illiterate individuals?
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I can't actually remember the name of the theory explaining existence itself, i.e. if you don't believe in a higher power then how did everything come into existence in the first place? Then it follows up by "then if you do believe in a higher power, who created that?". It's infinitely recursive, and I can't remember the name of it! >_< Ah well, back to work