And Al! With the Reverend! It was brutal, but Al's a brutal, hard man -- the only one hard enough to do that. And in an inexplicable way, that's the moment I fell hard for Al Swearengen, a hard, mean, selfish bastard capable of such brutal, beatific grace.

And Seth is just a lawman at heart, he can't help it. It's partly a matter of how injustice just makes his stomach hurt and his fists clench, and partly, on some dark level, of how it aims him and focuses him and gives him a place to maybe sometimes use those fists. If Sol isn't there to save him.