Their crime must not be allowed to 'go unpunished'.
(..) You did that. If people are dead, that's on Rome. You tried to kill Messala. I told you to stay away from him, Judah. I warned you! I won't let him go unpunished for what he's done to us. I can't. I watched my father be killed. I know what it's like to want to take your feelings out on others. (..)2016 Ben-Hur