I just would like to complete my answer to your question “Where do you get this material from.. It is unlike most Christian literature”
According to the parameters of the Christian Church, one should receive the scriptures as they are presented to us, having no need to investigate the root/origin of the names and terms once used in the sacred texts in their most ancient manuscripts. But if someone starts to investigate, then it is because the understanding is required from all of us, as it is said: Love with all your understanding.. And it doesn’t mean that one would be “not receiving” the words in scriptures. If you had made the translation of the Hebrew name of the Firstborn son of the Most High, I would receive the Name as you had translated, and I would call the Firstborn-son by the Name that you had translated to your language, because you are a person/ an human being. And if the translation of the name was not a translation, but simply “a version”, given to us by a spiritual ministry called ‘first beast’(doctrine), then I wouldn’t receive. The Lamb has told to all, saying: don’t receive the things that the first doctrine has sanctified.
[I do not even know if is this is the thread to talk about it, but if you point what is the appropriate one, then I would like to respond all your questions/ or inquirements/ about these materials].