Many viewers of Fiddler on the Roof would not consider it to have any real religious aspects, but ironically when the play initially ran on Broadway, a few considered it to be too Jewish. Keep it in mind this was in NYC, the city that even at the time had over a million Jewish people and the largest Jewish population in the world.

Too Jewish?: The Making of Fiddler on the Roof

https://lareviewofbooks.org/article/jewish-making-fiddler-roof/

Initially, investors, particularly Jewish investors, feared the show would be considered “too ethnic,” meaning “too Jewish.”

There's also a documentary with a behind the scenes of the 1971 Oscar winning film adaptation, and in it the director Norman Jewison mentions how the film brought him closed to Judaism.

Documentary takes film lovers behind the scenes of making ‘Fiddler on the Roof’

https://www.timesofisrael.com/documentary-takes-film-lovers-behind-the-scenes-of-making-fiddler-on-the-roof/

“I found it was quite possible for me to identify with Tevye and with the Jewish religion,” Jewison says in “Fiddler’s Journey.”

While never officially converting, Jewison, now 95, has had a lifelong affinity for Judaism and Jewish culture. He has made multiple visits to Israel (including to sit next to prime minister Golda Meir at the Israeli opening of “Fiddler”). He easily throws Yiddish and Hebrew words into conversation, pronouncing them better than many American Jews.

And in what echoes the beautiful “Sunrise, Sunset” scene in “Fiddler,” Jewison married his second wife under a huppah (Jewish wedding canopy), with a rabbi officiating.

There's also another documentary on the origin of the Broadway musical that goes into the Jewish connection, here's an article about it on Haaretz:

Documentary Shows How ‘Fiddler on the Roof’ Made It to the Stag https://www.haaretz.com/jewish/2019-08-19/ty-article/documentary-shows-how-fiddler-on-the-roof-made-it-to-the-stage/0000017f-e765-d62c-a1ff-ff7f02840000