Oneness, I speculate, provides a neat theological quasi-Christian framework for atheists. If you believe in the Oneness framework you can be “pentecostal” and still be an atheist. Sounds great in a nation steadily being swept up into secularist atheism. You can have best of both the religious cultural community, and the atheism. If Jesus is the one divine human being, there need not be any being in your theological worldview which is not at least partly human. No need for any “unhuman beings” to be part of your reality and philosophy. Father and Spirit get rolled up into the single human being Jesus. Maybe he did not exist, but you can go along with the existence of scriptures on this basis. It gives an atheistic, human-only framework in which to explain every verse of the Bible.