I don't accept your claim that knowledge flows from "unproven presuppositions", but that's irrelevant....The problem is, no knowledge flows from your presupposition that god is the immaterial, timeless, spaceless and personal creator of everything. All your arguments must assume one of several of these things to support themselves.
If you must presuppose something to achieve a conclusion later, and your conclusion (god is the immaterial, timeless blah blah…) is hidden in your initial presupposition, then you never achieved any further conclusion at all. No knowledge was ever produced according to your own epistemic standards. In this case, you are basically lying to yourself: you are pretending to know things you don't know. And pretending to know things you don't know is a guaranteed, certified method to keep yourself deluded about reality.