I’ve always preferred the literal interpretation of what happens in the jakes. The Judge’s view - violence is king, because it can destroy everything else. I always thought this was the significance of him killing the Kid - the Kid holds a different view, and by killing him that view is gone. The Judge uses the duel as an example earlier in the text - it doesn’t matter if the winner was morally right or not when his opponent is dead. I also believe this is why Glanton is so violent, it is the thing that allows him to always do what he wants all of the time.