Reaching into a Wiki rabbit hole and pulling out a story from his youth:
“...Newman's parents were non-observant Jews: Newman himself is an atheist.[13] He has said that religion or any sense of religious identity was completely absent in his childhood. To illustrate this, he has often recounted in interviews an antisemitic incident that occurred when he was young: he was invited by a classmate to be her date to a cotillion at her Los Angeles country club, the Riviera Country Club.[13] He accepted the invitation but was subsequently disinvited by the girl's father, who told Newman that his daughter should never have invited him because Jews were not allowed at the club. Newman hung up the phone, then went to ask his own father what a "Jew" was."
https://www.youtube.com/watch?v=7zDt8xyVKtw