Ahh classic pop culture thing. In Bible it says that Satan and Demons are angels in past, so there no point for them to be damaged by invoking holy entity. Basically they can go to Heaven if they can and will be fine (well until some angel will destoy them or banish) So technically and theoretically demons shouldn't be damaged or afraid of anything holy.
Sorry, had a hard day and for whatever reason decided to trow my fistration here of all places. Sorry if I was not polite or offensive.