Weird, I've been thinking about this lately....
*They are basically a "brotherhood" with Dillon as their spiritual and moral leader (although he is not in a position of authority over Andrews)
*Some (most?) have taken a vow of celibacy, which also includes women.
*Golic is the outsider - the "crazy" one, and the only one to sympathise with the beast.
*Morse made a deal with God to live forever.
*The believers are seperate from the non-believers.
*Some (like Golic) see the arrival of the alien as a coming of the apocalypse.
*The prisoners refused to leave Fiorina - they must be like some kind of spiritualist monks.