Ron Howard: "Hey Fonz, F-you you stinking papist! Go worship the pedophile whore of babylon!""
Henry Winkler is Jewish.
I think you missed the point. The character Fonzarelli is obviously supposed to be an Italian-American, thus probably a Catholic. The statement is aimed at the Fonz, not at Henry Winkler.
So Opie grew up to be a bad boy huh? Little Richie is a sh*t disturbing liberal? Sad...So sad...
Ah, grasshopper. One must have wasted one's youth like I watching the Fonze to know the true answer.
Fonze grew up in an orphanage and never went to Church, and never believed in God.
He gained faith and was baptised after a car crash, along with Richie, Potsie, Ralph, and Joanie by Al's twin brother who played a priest of uncertain denomination but the church was called "St. Barnaby's," which is a catholic (lower-case intentional here) type name -- could be Roman Catholic, Anglican Catholic, whatever.
But Richie's parents are made Fonze's godparents, and if they weren't Methodist or Presbyterian, then the world is flat.
And they sang "Faith of Our Fathers," while getting baptised, a WASPy song if I ever heard one.
Since they weren't dunked, I can say it was not Baptist, but that's about it.
Basically a made-up denomination.
(Episode 88)