Okay mP... here is some things from the bible to hopefully help you to see that it is Christ who shows us God; not the OT, not men, not religion... but Christ:
"This is my Son, whom I have chosen; listen to him." Luke 9:35
"I am the Way, and the Truth, and the Life. No one comes to the Father except through me. If you really knew me, you would know my Father as well. From now on, you do know Him and have seen Him. " John 14:6,7
"Anyone who has seen me has seen the Father." John 14:9
"The words I say to you are not just my own. Rather, it is the Father, living in me, who is doing his work. " John 14:10
Then these teachings from Christ:
"You have heard it said, love your neighbor and hate your enemy. But I tell you; love your enemies and pray for those who persecute you, that you may be sons of your Father in heaven." Matt 43:45
"You have heard it said, eye for eye and tooth for tooth. But I tell you, do not resist an evil person. If someone strikes you on the right cheek, turn to him the other also."
"Forgive and you will be forgiven." Luke 6:37
And then regarding God not changing:
"Every good and perfect gift is from above, coming down from the Father of the heavenly lights, who does not change like shifting shadows." James 1:17
"I (YHWH) do not change." Malachi 3:6
We are told to listen to the Son. If the Son shows the Father, and the Father does not change, then the Father ALWAYS was and IS, as Christ shows Him to be. If anything shows something that conradicts what Christ shows... then that is due to lack of understanding on our part or the scribes, translation errors, scribal errors (then or now), and mis - teaching, etc.