I would think that christians don't usually claim demonic possession (or witchcraft stories I guess)
Normally they claim that non-christians are posessed, I think. this is just my own intuitive perception of the christian community
EDIT: Let's say for the sake of the discussion, that the gap would not be filled in by such other auxiliary stories. How would you perceive it ?
Edited by slevesque, : No reason given.