[He doesn't doubt that. He has read Dean's file, after all. What he doesn't know is why Jerry isn't dead.]

Okay, so...why didn't you kill him? [His voice isn't annoyed, just curious.]

Exactly. [Dean sums it up exactly the way Stiles sees it too: Jerry's brought his troubles on himself. If he'd kept his fangs to himself, then none of this would have happened.]

I'm not sure there's anything specific to learn here, actually. I think we're pretty much in agreement.