Well, you know. Nothing's stopping you.
The religious ones were always prominent and you can't let it put you off.
See for example Joe Hill's 1911 song The Preacher and the Slave. It's a song that addresses the conflict between union soapboxers and religious ones.
Lyrics from Mudcat:
Preacher and the Slave
Long-haired preachers come out every night,
Try to tell you what's wrong and what's right;
But when asked how 'bout something to eat
They will answer with voices so sweet:
Main Chorus:
You will eat, bye and bye,
In that glorious land above the sky;
Work and Pray, live on hay,
You'll get pie in the sky when you die.
And the starvation army they play,
And they sing and they clap and they pray.
Till they get all your coin on the drum,
Then they tell you when you are on the bum:
If you fight hard for children and wife
Try to get something good in this life
You're a sinner and bad man, they tell,
When you die you will sure go to hell.
Workingmen of all countries unite,
Side by side we for freedom will fight;
When the world and its wealth we have gained
To the grafters we'll sing this refrain:
Last Chorus:
You will eat, bye and bye,
When you've learned how to cook and to fry
Chop some wood, 'twill do you good
And you'll eat in the sweet bye and bye.
Utah Phillips has a good version from "We Have Fed You all For A Thousand Years" includes a bit of chit chat with historical context. (I can't get this to play on any invidious instance for some reason, only youtube.com but it's worth it if you've never heard it.) He's got some other recordings talking about the larger historical situations of "the free speech fights" in early 20th c califorrnia. It was about worker power and suppression of union organizing.
Here is a different live version also from Utah Phillips Live at the Rose Wagner Theater, Salt Lake City, Utah, February 2005 (currently working invidious)
And a recording of Harry McClintock singing it (working invidious) which is like reaching back to the early 20th century.