Generally speaking, people who exhibit such a personality probably wouldn't be involved in shady dealings like colluding with the Demon Clan, because followers don't seem to have any reason to collude with the Demon Clan.
Although the Holy Light Church can be quite annoying at times, in recorded history, whenever the Demon King resurrected and people went to war with the Demon Clan, the Holy Light Church was the most actively involved, and the sacrifice in personnel and casualties far exceeded other churches. It was only natural for the Holy Light Church to appear on the battlefield against the Demon Clan in people's eyes.
"By the way, Gedwin, you don't seem to have faith yet. Do you want to also believe in the Holy Light? With the blessing of the Holy Light, your dungeon won't have a bad reputation among mortals."
"My reputation is pretty good; everyone loves Sain."
