They BURN heathens!! I mean...What could be more fun then burning?!?
Oooh oooh! I know! They throw people off church rooftops!!!
I may have misunderstood the way they work but I've always looked at it like this:
All the basic, simple Avatarloving 'fools' with some brawling mentality should join the Militia. Most are too 'dumb' to realise exactly what they believe in but they drop to their knees when they see 'The Avatars work'
If you're a holier then thou, Inquisition kind of, I'll stuff my religion down your infidel throat kind of guy I think yer more suited for the Church. They're meanies!