Actually, you can't really decide on anything without some sort of methodology.
Nobody I know of is claiming that there are definitely no gods, so your 'Godfree' nonsense is another straw man.
Shaker for instance has said in terms of questions of providence of the universe has cheerfully admitted that he doesn't know but it wasn't God.
That is a prime case of Godfree.
Ontological naturalist position is implicit in all forum arguments against theists.
You are wrong to portray these arguments as merely critiques of methodology.
Are you suggesting that al are some kind of weird theist atheist hybrid.
The person who actually needs to explain the leaky materialism you propose is actually Bluehillside but maybe you can explain how an ontological fence squatter can also be a vehement antitheist or anti supernaturalist.