Frank and Laverne are fighting because she refuses to visit the cemetery to honor her dead mother on her birthday. Later it's discovered that her reasons go deeper emotionally than just not liking cemeteries.
A religion is a belief system with rituals. The missionary kopimistsamfundet is a religious group centered in Sweden who believe that copying and the sharing of information is the best and most beautiful that is. To have your information copied is a token of appreciation, that someone think you have done something good.