Enrico: Look, not only are you a heretic… you’re a hypocrite! Your Hellsing Organization kills vampires for the same reason that Iscariot does–
Integra: No, Maxwell, it doesn’t. You kill monsters because you think that you have a god-given mandate to do so. Hellsing kills monsters to protect God’s people.
Enrico: It’s the same thing.
Integra: Most of the time, yes. But when a vampire is not harming any humans, we have no reason to kill it. We judge them by what they do. You judge them by what they are.