[This stranger is really starting to unnerve Zuko, with how much he seems to know, and how much his advice sounds like what Uncle Iroh would say. The guilt of it makes him snap.]

Don't you get it? I sent an assassin after him! Once he's dead, my problems will be over. [There's something frantic about his answer, more desperate than anything, even to his own ears. He turns around again to glare at Wan.] What you're proposing is treason. If we weren't on this stupid island, I'd have you thrown in a cell with my uncle!