Lol... OK, I'll try to be clearer but I'll probably fail:
Imo naturalism kicks the theos ("god") of monotheism out but wants to keep the monos ("one").
No supernature (I agree so far) but one nature encompassing everything.
There is no more totalitarian concept than this one nature (or universe) when you think of it.
Think of all the different, antagonistic forces, beings, desires, wills, which are abstractly "united" to "make it up". And among them the astounding variety of human cultures, based on different languages, all artificially constructed to differ from "nature," each one in its own way. Now we would have it all subsumed into "nature," and meld into "it" "spiritually" on top of that? Isn't such "nature," by definition, a supernature? An "idea," an "idol," a "god"?
I find the notion of "faith" inasmuch as it relates to "others," imaginary or real, infinitely more respectful of difference than fusional spirituality which aims at making everything "one".