Because people still died. People still lost children. And they don't know about Dracula. Most of them don't believe in him. They just know that an army came from the Belmont estate. I'm- the closest thing to the one who's to blame that they know of.

[ Because the Belmonts are here so that people don't have to be afraid. So the world can make sense. And sometimes people need something to burn so they don't have to be scared. ]

It'll make them feel safe. Give those who've lost something closure. Keep them from finding someone else to blame.