Primogen

"Well, I would consider Atheism to be a belief - it's the belief that God's absolutely do not exist."

You're forcing a perspective on non-believers that doesn't apply. I cannot prove that god doesn't exist (in fact, no one can prove a negative), but that doesn't mean that I actively hold the belief that he doesn't exist.

Yes, some atheists will tell you that they belief that god does not exist, but their opinions a) don't reflect those of all non-believers and b) are fallacious.