Thoughts:
What is the potential of this to be abused IG?
According to game mechanic, is still a religion if is founded like a religion (even if have another name and people use it to RP other thing) and to get people's sympathy they have to preach, and to preach they must be priest, and if they are priest they believe in something.
The real power of a religion is the ability to influence population and gain their sympathy, they cant do it if they do not believe in something, maybe is not something that other religions believe in (like a deity, supreme divinity, etc.) but they should believe.
Maybe in other hand, they don't know about guilds, because as far i have seen on OP's quote their message looks like from a guild.
Peace.
