Based on your quotations of verses and interpretations you are propagating that either God is bipolar or that you have to be bipolar as it goes against common sense and rationally acceptable logic.
Absolute monotheism would mean God is one, unchanging, eternal and that there is nothing in the heavens or earth or beneath that can resemble God (as is in the commandments in the verses of OT).
Pantheism on the other hand is the idea that God can dwell in animate and inanimate things. As was demonstrated by certain writings of Paul, what you and onetimehard have said (his sayings that God can even become satan, can be a tree that can be chopped up and burnt, become a human or 'anything').
Polytheism is that there is more than one God. Now you dwell a fine line between that, you claim that God is 'three persons'. You have concluded that based on Pauline teachings. Apocrypha books lack this and teach of a Jesus as a servant of God but these are 'unofficial' and therefore unacceptable, but since the NT is mostly Paul's letters and writings you base your teachings on this.
Remember Jesus' disciplines didn't accept Paul, they rejected him and doubted his intentions as he was a pharisees Jew and a servant of the Romans, persecuting Jesus' followers.
Jesus' followers held the law, while Paul like the Romans wanted to rid themselves of Jews and the law.
As I mentioned in the first paragraph, your interpretations of verses basically make God out as bipolar or you have to be bipolar to accept these claims.
Such as:
-'god' praying to God; as in one example three times with the companions falling asleep the third.
-'god' sitting at the right hand of God.
-'god' not knowing but God only knows the time of the hour
-'god' crying out to God for help
-'god' saying that he cannot do anything but without God
-not 'god' 's will but God's will be done?
Etc...
There doesn't need to be a specific pagan belief to be identified although Mithraic paganism was accepted between the 1st and 4th century, not 'later' it was a 'rival' to the christian faith. And as we know much of christianity blended with paganism.
Jesus was not born on december 25th and christmas has nothing to do with Jesus. Easter has nothing to do with Jesus. Although something quite later, but it should be acknowledged.
Nor the traditions revolving around christmas with the tree, shoe, door decorations, star, etc... all pagan things. Although again later pagan additions, none the less shows the nature how christianity has moulded through paganism.
The faith of the Jews was not accepted by Romans, they wanted to destroy the Jews and their law. Hence it is quite convinient for Paul to try to lead the early followers including disciples of Jesus to abandon the law. An almost early conspiracy to do away with the holders of the law, the jews and their law and replace it with something acceptable to the roman empire.
Why do you think the Pope is called the 'holy father'?