Stout Atheist, though I do not agree with the perception that a stereotypical athiest states that God does not exist (subtext "for definite"), rather make the assertion that from what we can tell, it's unlikely that there a God (or Gods), a better phrase would be "God probably doesn't exist" to describe an Atheist standpoint.
My justification of my position: Most Modern religions originated in a Barbaric land, their God(s) are Barbaric, I'm not a Barbarian, the religions don't suit my view or understanding of the world. (One could also make a note about how credible Barbarian people who were barely educated are, depending on which religious text you follow) Note that this doesn't apply for all religions or even all Modern religions
Regardless since the question is more or less unanswerable - I'm not one to care about it, does he/she or they exist? who knows? but it changes little. I think the better thing to focus on is the works of the Entity and the agents of religions, i.e. If the God or Gods exist, are they even entities you -want- to worship? In my own personal case, no, definitely not. Given their "free choice" to ignore world problems, or even cause them, I have absolutely no interest in worshipping all powerful entities who quite happily let them happen. Whatever scripture or hockus pockus you want to dab on the issue as to why they might not, doesn't justify their actions to me - and I won't worship an entity out of fear for it as I find that weak.
Edit:
Disagree
fixed, while some atheists are stout believers that there is no god, saying that's the definition of an Atheist conceptually, is a misnomer - the foundation of Athiesm is based on the fact that we cannot assert what we cannot prove, therefore to make the assertion that a God doesn't exist, is to deny that foundation
Edit 2:
Archaeological evidence may exist of the people who lived, but that doesn't mean what they taught morally or spiritually, is true.
I think you skipped out a BIG section of your bible reading, let me quote myself from a previous religious thread on this matter: