I'm not sure whether I agree with some of this. Is materialism the belief that all that exists is the physical universe? Or is it the belief that all one can know about (without special revelation) is the physical universe?
It seems that one can accept the existence of a deity and of an immortal soul but be a materialist in practice. (I'm thinking of those Christians who are practicing scientists, for example.)
But then, I am coming into the middle of a conversation that I was not following, so maybe this was already discussed.
"Intellectually, scientifically, even artistically, fundamentalism -- biblical literalism -- is a road to nowhere, because it insists on fidelity to revealed truths that are not true." -- Katha Pollitt