Chuck and Jo were way ahead of the curve. They married in 1955. At that time, the Jewish-Gentile intermarriage rate was less than 6%.
Jo was from an involved and practicing Christian family. She knew Jewish people and their culture, but hadn’t envisioned marrying one. That is, until she met Chuck.
He was from a traditional Jewish family. His parents came from Russia and raised him in a religious home near Cleveland, Ohio. After serving with the U.S. Air Force during W.W.II, he and his family moved to California. When Chuck and Jo got married, they didn’t have very many models for how to be a Jewish-Gentile family.