Uhm… didn’t you read??? The reason why she knows there is a vampire is because she used the “Holy Fire” she uses it to determine the existence ‘of Vampires’ meaning if you aren’t a vampire and received Holy Fire, it will give that person Blessings and Luck, and Pain, agony and suffering if you are a Vampire. She determined the village was full of corpses and vampires because she has a sense for it and used “Holy Fire” to determine that it was indeed full of vampires, since they turned the people in the village into vampires, and they dug up the zombies.. for whatever reason. Her burning the village down was a reasonable action.

Fcking bitch, let's see who's evil here. Burning villages where you don't know if there's a vampire in it or not? Tf, you're just committing massacre