I think we ought to tread lightly when we attempt to work out our beliefs in our own mind and when we argue them. The most common argument is that the other person simply refuses to accept the evidence and apply the simple rules of logic. I don't think its that simple.
Since the Holy quantum has previously been invoked, I'll note that Einstein and Shrodinger never accepted quantum theory as a final explanation of atomic theory, yet Bohr and Heisenberg argued heatedly that it most certainly was. Now I doubt too many people will charge Einstein and Shrodinger as illogical and harking to an unproven faith (although thats probably what they were). Einstein saw that particular abyss and recoiled where Bohr dove in head first.
Similarly, Roger Penrose and Steven Hawking have published argumentative books on whether the universe is fundamentally based on mathematical principles or whether we humans have made a useful mathematical map of the world that works pretty well in different circumstances but math is a human invention, not an underlying principle of the world. Again, these are two very bright learned people who see the same evidence, use the same rules of logic and come to very different opinions.
I think we, as individuals, need approach the subject of god with some humility and a willingness to learn. It's also helpful to be specific. I have studied a few gods - jehovah, the mormon god, catholicism, some judaism, a bit of Islam. I don't believe in any of those constructions. Further, after being raised catholic and being a dub most of my adult life, I find it strange that, in fact, my life in unbelieve is really not that different than my life in belief. Except I don't feel so quilty all the time. So the question becomes 'If my life is the same with or without a belief in god, what is the use of belief?' For me, none. I can see though that others might conclude differently.
I do resent the idea that because I stopped believing JW theology, then JW rationalization requires that I must have fallen into all sorts of immorality. I keep waiting for the sin to carry me places I've never been before (but daydreamed about plenty). But it just doesn't happen. If so, my deliciously lovely stewardesses would have invited me to a nite of sin - with three stewardesses, ahh the heart skips a beat- instead of an intellectual discussion on god. Point is, I'm not the person JWs require to be. My morality is not tied to fear of destruction at Armageddon. Its just who I am.