Irrespective of who wrote the books, the question is what kind of God is described in the Hebrew scriptures. Does the Hebrew God not specifically warn the Israelites over and over again not to behave like the nations around them or even worship Him the way the nations around them worshiped their gods? So how can you say they were influenced by their surrounding culture when that is precisely what they are warned against and told to come out from?

Secondly, I don't see your alternative model here. All you've said is I have a head, a goat also has a head, therefore I am a goat? What's the link? And how exactly do those gods influence the multiplicity of persons in Yahweh? And for the umpteenth time, the trinity is not multiple gods.

Genesis says let us make man in our image then it says in the image of God made HE him, male and female created HE them. So a singular pronoun right after a plural one. So multiple persons in the one God.

On your Mark point, again (and very respectfully), you need to get MODALIST nonsense out your head mehn! Of course Jesus and the Father are separate beings...but even going by your standard that only people Jesus calls good are God, guess what?

After calling God the Father GOOD, Jesus calls Himself the GOOD shepherd and then calls the SPIRIT GOOD in the below verse,

Luke 11:13
[13]If you then, being evil, know how to give GOOD gifts to your children, how much more will your heavenly Father give the HOLY SPIRIT to those who ask Him!”

So even if I went with your logic on the "good" argument, you still get the TRINITY.

Again I ask, what better model are you proposing to account for the simultaneous plurality and singularity in the God of the Hebrew scriptures? I propose trinity you reject it, what do you propose?