I don’t know who the “we” is when you say “what we call God,” but I think you might be talking about Hinduism or about the split between mysticism and exoteric, more symbolic, popular and eclectic religion. My point was just that polytheism isn’t exactly the worship of one god above all other gods. At least, that would be a monotheistic skewing of polytheism.
I’m an atheist and I subscribe to philosophical naturalism, so I don’t think there are supernatural creatures known as angels. However, I suspect such religious symbols derived from psychedelic experiences which are quite real. But I doubt we contact extraterrestrial beings via peak states of consciousness.
Regarding Yahweh, I just follow what critical scholars say about the history of Judaism, that Yahweh was originally the storm god in the Canaanite pantheon. I’ve written about this at length here on my blog, if you’re interested (scroll down to the Judaism section).