Arguing that God is not outside of space-time and did not create all matter would go against the most common philosophical arguments for believing in God in the first place.
Not everyone finds these common philosophical arguments to be believable anyways, or to have too many assumptions.
And I think most religious people don't believe in a God because of a philosophical argument anyways, but rather because they believe in Jesus or Heaven or the Koran.Well, one of the main reasons why Christianity, Judaism, and Islam agree on your three aforementioned properties of God is because they've all subscribed to their concept of God as being the identity of the 'God of the philosophers' from the various cosmological arguments. If you want to dismiss all such arguments in one fell swoop and rely only on experiential knowledge, you're never going to come to a coherent common understanding with people, or have much faith that your understanding has a basis in reality.
But for the sake of discussion, I'll put aside natural philosophy for a second and try to put a Protestant hat on
and look at the what the Bible says:
If nothing else, it should be apparent that it is virtually impossible to be a Christian without believing in an omnipotent, omniscient, and all-loving God.
