I'm Native American (indigenous, or whatever other moniker you've heard). Both of my paternal grandparents were subjected to the horror of boarding schools. So forgive me if I'm a bit cynical when it comes to the methods deemed appropriate by Christianity to "turn us all to repentance and bring us closer to God."
I would argue that instead of being a tool to try and convince more people that the Abrahamic god is the "right one", maybe think about using LLMs to challenge your own biases regarding religion and to question the myriad of moral and logical issues presented within your holy book.
Just a suggestion from someone also looking at the idea of utilizing LLMs to preserve and explore indigenous language, culture, and wisdom without becoming a slave to the technology.