There are no non-theistic gods. That's what theism is... belief in God.
To me that's just humpty-dumptyism. It's redefining God to be something God never was.
If God is a "communal engagement" then it's equivalent to an idea, or a feeling, or perhaps a mass delusion. In that case, the experience is real, but nothing actually God-like is real.
It's kind of like re-defining phlogiston as the experience of seeing something burn -- which has no bearing on what phlogiston was actually believed to be before it was debunked.
The contemplative Asian sects have been at the redefining game longer than Westerners, that's all.
Personally, I'm not much interested in the question "Can we re-define 'God' in novel ways to refer to non-Godlike things which we already know exist, such as ideas or the universe, or to refer to utter philosophical abstractions that have no actual referent?"
That seems unimportant and trivial to me. However, the question of whether God actually exists... that's important.
I haven't said that, and wouldn't.
I'm not talking about all uses of these words -- such as calling Clapton a guitar god, for example, or saying that sleeping in til 8:00 and being served breakfast in bed is divine.
I'm not saying all definitions of the words, used in any sense whatsoever, are empty or nonsensical.
I'm talking about definitions of "God" or "gods", divine beings which theists actually believe in.
When we're talking about that, then yes, all definitions are either contrary to fact, or fall into some fatal error such as self-contradiction, lack of definition, emptiness, humpty-dumptyism, etc.