I'm not Jewish. I simply knew and know that the God of Israel is the only God. So does the Urantia, btw, they didn't start a new rendition of God, they just reinvented, literally, the parts they didn't like or thought were inappropriate. I did the opposite: I wrested with God, like Jacob, I didn't rewrite and edit Him. That would be a god in MY image. This is the difference. Like I said, I know you'll not listen, but I'll say again: The Urantia asks nothing of me. It is a book of philosophizing.I ask myself the same question and the truth is that had I been a thoroughly indoctrinated Jew, maybe a Pharisee or member of the Sanhedrin, prior to the spirt birth I may well have hated Jesus myself. I was always annoyed and uncomfortable with the term "born again"... until I was born again.
I'm somewhat sympathetic with the Jewish people. They had been faithfully taught that keeping Gods statutes which are found in their scriptures is the way of salvation. Nowhere in all of the history of the Israelites were they interpreting God having a Son in heaven who was coming down to be a voluntary sacrifice to pay a sin debt! That's been forced into their scriptures by atonement theorists.