Really? So St. Paul was a Catholic. Wowser. And here I thought he was a Jew. And that Jesus was a Jew. And the both followed the Law as in the Ten Commandments. I guess Jesus came to destroy the law. Not in my Bible.
He was a Jewish Catholic.
The very Catholic Cardinal Aron Jean-Marie Lustiger, former Archbishop of Paris, was an Ashkenazi Jew. He was clearly Catholic, but if you asked him his ethnicity, he would say straight up that he was Jewish.
Why could one not be both?