Pathos: Hey look, just because they poison the earth it's not a reason for you to hunt them. They have families and people who care about them. If they dies that means all of their future opportunities will be gone the second they breath their last breath. You, by doing that, is certainly the most guilty among all you've slaughtered.
Logos: Killing is not gonna make you any better than the people you have killed! It's an act of immorality. One day you are going to get in trouble. This is simply illegal.
Ethos: I have accomplished many books that you admire. I have also marked many battlefields with my own blood. Non of that can make me a gruel heartless creature like you. I will never commit such act.