I was unclear. I was saying that as an agnostic, I don't see how either side are so sure of themselves. There's no clear evidence that I can see either way. So, to me, atheists and theists both are making unproven assertions of faith.
Oh, alright, I appreciate your clarification.
My main point is that, depending on what god is described, it certainly can be (and has been) disproven. In these instances, it is not a mere assertion that this particular god doesn't exist. Also, due to the null hypothesis, it's reasonable, rational, and logical (i.e., normal) to have a stance toward any god-concept to be that it/they do not exist without providing some sort of positive evidence of that existence. Again, no faith required for the null hypothesis; in other words, no faith is required to firmly state that gods do not exist without having some evidence to support this existence.
There is also ample evidence that gods have been and are invented by humans and do not have any kind of existence outside of imagination. So there is that then as well.
Any way you slice it, there is simply no equivalence between theists and atheists, even if some atheists have arrived at their particular conclusions in an illogical or purely irrational manner. The irrationality of some atheists and their particular manner of concluding the non-existence of gods does in no way support the theist perspective of the existence of gods.