Well, succubi are demons, and thus they aren't on the best of terms with heaven & the beings that reside within. People talking with succubi will usually adopt their lingo to be polite and because invoking the name of a holy entity can damage a demon, kind of like how holy water hurts vampires :3
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.