But I’m on the second episode and I guess the Christian god just canonically exists in this show? Crosses and holy water and shit work on vampires. Seems like a bold choice for a show to say “uh yeh that deity canonically exists in our show but I guess it’s just indifferent or whatever?”
Maybe this gets lampshaded at some point but in the second episode it’s weird as fuck lol
So from my recollection they never deny or confirm the existence of the christian deity and they are actually kinda agnostic about it.
In the second season one of the Vampires boasts to his followers that he was present at the crucifixion of Christ. This prompts a response from fellow Vampire and MVP of the show Spike who responds: "Please. If every vampire who claimed he was at the crucifixion was actually there it would have been like woodstock!"
Honestly the reason the Vampires in the show are burned by crosses or holy water kinda just falls into the same reason sunlight burns them, or why they have to be invited inside a house even when other demons don't have the same stipulations. Its the same reason any of the other supernatural elements act the way they do or have the weaknesses they have. Magic is this weird chaotic force in the buffyverse and that's basically just the particular way it happens to impact them.