The biggest sin a movie like Priest can make us to do stuff we've seen thousand times before…done better. The idea of a priest vampire killer with cool religious weapons (throwing stars shaped like crosses, rosary beads, etc) works when the movie focuses on those fresh ideas. But it falls from grace with every cliche accounted for (big bad is priest's friend presumed dead, must save his daughter, the head priest telling him to hand over his crucifix instead of badge because he's a loose cannon). There's a difference between dumb fun and a stupid waste of time. The filmmakers apparently don't know the difference.