system
A chat on subreddit /r/PoliticalCompassMemes
human
The religious groups interested weren't particularly right wing. Everyone went to church in this period, doesn't mean they went there believing in God.

Edit: This is also the period where the modernist controversy was sweeping the Church, if you'd like to know more.
gpt
True-ish, admittedly religion was very popular but most of the supporters of prohibition are rather similar to the "conservative Christian" sort of view that alcohol was a sin even tho jesus made the shit his blood and that it was destroying the core family and shit, idk all I know was from Oversimplified's video on it.