You have a MAJOR MISUNDERSTANDING of both passages of Scripture. Nowhere did Jesus say that Christians are "gods". That is the lie which the Devil put forward at the beginning -- "ye shall be as gods" and the end result was the exact opposite.
The Word of God came to all of Israel, so by your logic, all Israel would have been gods. But that is not the meaning of that phrase at all. Notice to whom God was speaking in this Psalm:
God standeth in the congregation of the mighty; he judgeth among the gods. How long will ye judge unjustly, and accept the persons of the wicked? Selah. Defend the poor and fatherless: do justice to the afflicted and needy. Deliver the poor and needy: rid them out of the hand of the wicked.
So the judges (magistrates) of Israel are called "the mighty" and "the gods", but at the same time they are soundly rebuked for their injustice, their oppression, and their wickedness.
The judges of Israel stood in the place of God to dispense justice. That is why they were called "gods" (the mighty ones) and this is evident in "the congregation of the mighty".
I have not a misunderstanding. Jesus says ye are gods sons of the Most High echoing the Psalmist to whom the word of God came saying the same. The verses are even posted on here for any to go check for themselves.
As for the old serpent. Well it's just simple, man was made in the image of God, yes? God gave all manners of blessings to man and gave him the dominion over the earth yes? The serpent whom is called Satan is the most subtil beast of the field which God created and was a liar even from the beginning it is written, yes? So the serpent essentially deceived the woman with a lie basically saying that they would become gods if she were to disobey God whom told the truth commanding not to eat from the tree of the knowledge of good and evil for if they ate of it they would die. Yet they were all ready as gods by default, therefore the serpent did lie, and for disobedience and unbelief comes death.
As for your strange doctrine which is made by man and not by God, no, that is not what those verses says, the Bible does not say "Ye are judges sons of the Most High". The Psalmist to whom the word of God came as confirmed by Jesus says, "ye are gods, sons of the Most High."
We will basically only run into circles with this so I will leave it at that. I believe the scripture cannot be broken and I believe in what the Lord Jesus Christ said and I do not believe Jesus to be a liar like certain men and their doctrines would by subtlety make him to be. I will not be convinced to disbelieve in what Jesus nor the Psalmist to whom the word of God came say, and truly it is written twice that they say "ye are gods, sons of the Most High." The sons of God shall inherit the Kingdom of God, and those that are not his sons shall be cast into outer darkness and fire and there will be much weeping and gnashing of teeth, praise the Lord God Almighty.