Your epistemology and categories are already flawed, as if there's an analogy between a thing (like a horse) and the Ground of Being (classically called "God"). God in classical theism is not a "thing" among things. If you think classical theism posits deity the same way people posit horses, of course you'll want "evidence" that is empirical.

So wouldn't it be helpful, for the sake of the thought experiment proposed by shawndumas, to at least see where his reasoning leads? The premise ("There is a God") might not be true, but an a priori exclusion of such a being seems no more based on logic than the counter claim. What is helpful, I think, is if by looking through those lenses we see if God gives the world more explanatory power than by not looking through those lenses.