"Theories of how god could exist"? I don't think that any theists have ever tried to create such a theory. I expect that most of them would consider doing so to be impossible.
By calling them "dumbass" and telling them to "bog off"? Anybody can be summarily dismissed in five seconds with no effort at all. It doesn't matter what they say or how much sense it makes.
If your question has any philosophical interest, then it's probably as a meta-question, an inquiry into what kind of question it really is, how somebody might go about answering such a question, and what kind of reply would even count as an answer.
Science seeks to describe physical reality, and then (at least in physics' case) tries to correlate physical events with other physical events by interpreting everything as instantiation of some abstract invariant relationship expressed in mathematical form.
I fail to see what relevance science could have to answering the question of "how god could exist", assuming that the question even makes sense.