It isn't 'polytheistic', it's just literary devices; different names for different aspects of the same entity. There are several 'names' for God on the OT, all symbolizing a different 'face' in dealing with mankind, or individuals. Some of the references are plural, some 'singular'. The choice used in a writing usually indicates a more specific aspect is being emphasized, and is not referring to a different 'person'.
My hand is not my ear, but I have both of them. The use of anthropomorphism for instance is a literary device, and used as early as Genesis, and refers to God 'walking in the Garden'. Why would He 'walk'?
And, as 'God', why wouldn't He be able to manifest His presence any way He wanted to???
nonsense. The trinity is polytheistic by definition and claiming that Jesus was God is not a literary device. it is blasphemy.
There never was and never will be a human being that was God or became God.
There is only one God with two witnesses. Two 'others' calling out to each other across the river of time. One God two olive trees, one God two candlesticks, one God two lamp stands, one God two trees of life in the middle of paradise, one God two staves to lead the flock.
And if Jesus is to be believed there is only one messiah, which means the two witnesses represents the same being appearing twice. "And I have other sheep that are not of this fold. I must bring them also, and they will listen to my voice. Then there will be one flock, one shepherd."
One God, one messiah.
First I will send for many fishermen, says the Lord, and they shall fish for them. After that I will call for many hunters and they shall hunt them out from every mountain and hill and from the crevices in the rocks. For my eyes are on all their ways, they are not hidden from my sight, nor is their wrongdoing concealed from me."
Jeremiah 16:16