I have always looked at Oneness theology as being made up by people without a solid understanding of Greek and Hebrew, and a weak attempt to try and answer the questions of who God is. They start with the Shema in Deuteronomy 6, and then continue down a blind ally that is meaningless. I don't say this to insult people, but rather to gently show these people how lost they are. Like the video on page 1 of this thread, I also take Trinitarian belief to be salvic. Which means that Oneness is wrong, and the person is not saved.
We have been friends for 40 years with a man that we met in a regular Pentecostal Church. They believed in the Trinity. Many years later, he was trying to trip me up on the Trinity, and prove there was only one God. I hadn't been to seminary, at that time, yet, but I had studied the Trinity. I spent a lot of time arguing this with him, using Scripture to back myself up. He was dead stuck on Oneness, and went on to write a whole commentary in the Bible from a Oneness perspective. Except he had poor grammar, and the worst spelling. I tried to help him with his English, but gave up, overwhelmed by the English mistakes. I have literally never seen anyone with such a poor understanding of English. Yet, he published that commentary, and set himself up as a teacher and preacher, and many followed him. It's beyond my understanding why anyone would follow someone not just with bad writing skills, but also with a total disregard for theology. So, yes, it is important how and what you write. But if a Oneness Pentecostal had perfect English, but held onto bad theology, we still need to walk away from terrible theology.