You know... any good discussion about God should start with a list of definitions.

So, the question "Does God exist?" has to come up and narrow it down to the following definitions:

• What's God? God as Creator? God as Supreme Being? God as Experience? God as Metaphor? God as Historical Idea? God as Philosophy? God as Energy Field? God as State of Mind?
• What kind of Existence are we talking about here? Material Existence? Existence as a historical trend? Ideological Existence?

Starting the argument without actually defining the parameters is stupid. In the end all you get is a dozen idiots beating off their meats ideologically, to no benefit.