Many in the Jewish community would reject that Paul belonged to the Jewish faith after teaching that Jesus was the Messiah. Paul believed Jesus was the promised messiah spoken of by Jewish prophets. Paul believed the Jewish faith was being fulfilled by Jesus. Why would he not be considered Jewish in faith then? It would seem to be the logical conclusion. Paul had a Jewish heritage and since Paul viewed Jesus to be the promised Messiah spoken of by Jewish prophets, it only follows that Paul still belonged to the Jewish faith. Paul got black balled it seems.
Then again, I've heard theologians suggest that Paul converted to Christianity, which I think is a misrepresentation. I don't think theologians should view Paul's belief that Jesus is the messiah as a conversion from the Jewish faith. A conversion implies he converted from one religion to another, when Paul did no such thing. Paul may have converted from being an executioner of those who followed Jesus to a believer in him, but he never converted from the Jewish faith to what we know as Christianity today. He taught a progression of the Jewish faith instead of a conversion to another religion.
I may think Christianity is a shadow of its former self, but I do view Jesus to be the chosen messiah as prophesied by Jewish prophets. Judaism is Judaism and in my honest opinion I feel like Judaism got left behind in the dark ages of strict written law instead of progressing towards spiritual law's pertaining to the human heart. With that being said, do you think Paul taught a progression of the Jewish faith or that he converted to what we call Christianity?
Christianity and Rabbinic Judaism both come about during the 1st century. They both came out of the same Judaic community. Paul claimed to be a Pharisee, but whatever he takes it upon himself to define Christianity. Based on his belief in guidance by the Holy Spirit. That's the Christianity that survived. He interpreted the OT to support his ideology. Rabbinical Judaism held a different interpretation.
I guess that means you see Paul as having the authority to make that interpretation? Not the Rabbis...