The words 'god' and 'God' convey no meaning, since we could call the four natural forces 'gods,' and the unified force that existed in the very early universe 'God' if we like, and we wouldn't necessarily be wrong. But why call it that? The forces, either separately or collectively, have no discernible agency, intention or personality. This 'God' the Christians worship also has no discernible agency, since it seems to rely on the natural forces and random chance to act, with seemingly no will, intention or personality.
Many humans claim to know "God's will" in order to push their agendas, when in reality (there's that pesky word!):
1. No God exists
2. A non-existent God cannot have a will
3. No human can know the "will of God," since by (1) and (2) no will of God exists.
But yet can't explain the natural phenomena that happens everyday in front of them.
This is the basic argument from ignorance, assuming that because we don't know how something happened God must've done it. But even if we admitted God did it, we still wouldn't have an explanation, we'd end all possibility of explanation.