Dean does kill people, yeah. But he was raised that way. He kills things that harm other people. Whether they all do it or not, everything is black and white to him. Just like it used to be before I took over Torchwood.
We are showing our teeth, Steven. But blood only ends in more blood. Do you understand what I'm saying? If we go out and kill Dean just because we can, how does that make us any better than him? Do you really think that would solve anything?
It wouldn't. There's other ways to solve things than death. And that's what we do. We try to find a way around killing people to prove a point. Because like it or not, Dean's just as much of a person as Jacob and Jaden.