Wait
..what? Theres a different God now then there was during Old Testament times? Im really hoping you didnt want it to come across that way.
I didn’t think it necessary to explain, but since you insist on trying wrest incorrect meaning from what I wrote I will spell it out for you.
The Jews did not know God as One God with Three Persons, as in the Trinity which we Christians have come to know Him.
The Jews did not and do not believe in the Trinity. To them, and according to what was revealed in the OT there is God, the Father; no God the Son and no God, the Holy Spirit.
It is the same God, but He revealed to us through Jesus that He is Father, Son and Holy Spirit.
So, God is the same, He is eternal and never changing, but the God we know through Jesus is not the God that the Jews knew.