Maybe if I give my perspective on naturalism, it will help you see where I'm coming from:
I think the word "natural" is just another word for "that which exists". This doesn't necessarily mean that I reject everything that people call "supernatural", but just that any "supernatural" things that exist are actually natural. Maybe they behave in strange and unexpected ways, but they're still natural by definition.
So... when someone starts talking about "naturalistic atheists", I generally assume that they mean one of two things:
- "atheists who believe that only things that exist exist" (which would be a weird redundancy), or
- "atheists who are arbitrarily closed-minded about things *I* consider supernatural"
I follow you. I didn't have in mind so much the idea of naturalism in opposition to "supernaturalism" as a matter of metaphysics, but methodological naturalism especially meaning certain epistemological assumptions about what can justify knowledge, what counts as evidence, and etc. Things get a bit tricky with all the connotations of terms. I think the ontological dualism implied by the word "supernatural" is probably untenable, and in a certain sense I would call myself a "naturalist" for that reason, even as a theist. If, as you say, the word "nature" just refers to everything that "is", in whatever way, i.e nature as a synonym for "reality". I don't really believe there are two separate and disjoint realities, the natural and supernatural. But the question is about how we participate in and understand "reality".
In any case, the point wasn't to attack "naturalism" as such, or to assert any particular metaphysics. I think science and methodological naturalism are very valuable, even if I think, as a worldview, "naturalism" in its most common expression dismisses an experience of reality that I think is very important. I don't have a question about the value of naturalism so much as a question about whether it describes the whole of reality without exception. For reasons that I think are easily understandable, naturalism is often contrasted with the most anti-science, anti-intellectual, fundamentalist, ill-considered "supernaturalist" views, and if sometimes people adopt a stance that is both hostile and immediately dismissive towards experiences and epistemological considerations that are outside of the usual range of "naturalism", they perhaps do so because they tend to think that is the only alternative to fundamentalism. And that's what I was suggesting is a mistake in my opinion.
But I'm not suggesting that the middle ground is any sort of theism or supernaturalism. As Windwalker posted about, there are non-theistic ideas about mysticism. As I said, the word "God" isn't strictly necessary, or "divine", or whatever synonym. They are useful words insofar as they refer to a very broad range of experiences and beliefs about those experiences, and that's all.That's why I said your reaction might be prejudicial. Most of what you are inferring has very little to do with what I was attempting to say. That's not entirely your fault, but at the same time I think my usage of the phrase "atheistic naturalism" is a fairly reasonable and neutral description, even if it might require a bit of elaboration.