But who is "god" and why exactly is he being credited with the creation of everything? That's the part that is absolutely man made. We're not given any evidence of where this came from, other than from people's imaginations.

I also don't subscribe that without god the other explanation is "an accident". If the origin of life and everything in existence is a result of a math formula or chain reactions, then our natural simulation is behaving the way it should.

For example, a basketball that is idle on the ground is not an accident. Everything from gravity to its internal inertia explains why it doesn't move.

Ideally, me and just about every Atheist in the world would gladly accept the existence of a god if he/she actually revealed himself to us. There would be no reason to deny such a cosmic deity if it really did exist. But given that I can go everyday not worrying about myths like Santa or the Easter Bunny, then god clearly fits the same bill of "he could exist, but I have zero reason to care if we can't actually communicate with him".