John and Hebrews have no validity. The Hebrew Scriptures do.
Isaiah 43:11, 45:5, 46:9. Numbers 23:19. 1 Samuel 15:29. Hosea 11:9. Job 9:32.
I see now what your mission is, and I cannot condemn you for it. You do not believe Jesus is Messiah. And you do not recognize the Trinity.
If a Christian denounces his Christianity, it was never there, so if you convince a “Christian” to convert to Judaism he/she was probably just not yet a Christian. However, many “Jews” become Christians, and from the perspective you have given me of yourself, you have a heart for the Lord, and search the scriptures for truth.
It is my opinion that you are yet blind to the truth, but if you continue your quest with a loving heart for the Lord, you will become a Christian.