When did I ever say I was excusing him? Not killing him in cold blood is not the same as letting him go. He murdered Fiona. Of course I want him dead! I'd like to cut his tongue out and watch him choke on his own blood. Doing that, inflicting the things that he might do on him would make me a bad person. I told you I'd kill him if he were actively attacking someone. If I was there when he tried to escape, sure.

A man sitting in a room, tied up? I can't walk in with a gun and just shoot him in the head, much as I would love to.