I was just reading the posts out here this morning and noticed you asked me a question. I am sorry for the oversight.I agree that God cannot change. But, Jesus did change. That begs the question, how is Jesus God?
The answer lie in the definition of the word God
The only thing that changed with the Son was a physical body. It grew. His nature did not change. Depending on the situation, Jesus either functioned as human or God. When he FUNCTIONED as human, he did not change his nature. For example, Jesus said he didn't know the day or hour of his return, only the Father knows that. Why didn't Jesus know the hour of his return, because he was FUNCTIONING as human, but he was and is God, his nature never changed.
Just like when Jesus appeared in the Old Testament as a man. He was still God, he just manifested himself as a man. The Father could do that also.