Dunno man, probably very important world and character building
Srsly tho, I think the biggest prereq to these movies is watching the horror films they riff off of. I was very confused in Scary Movie 2 because I didn't see half the films they referenced.
The case has to do with a Catholic priest, Chaplain Capt. Angus McRae, a pedophile who was...convicted of sodomizing a child at CFB Edmonton in 1980 and later molesting two boys in the Toronto area