This has been discussed before, but I find it interesting. Arthas' intent was to save his people, but there came a point where vengeance became his top priority. At the expense of his soldiers, and his people. By the time Arthas found Muradin and Frostmourne, he was willing to do almost anything to kill Mal'Ganis. But was the lich king calling him before he got to Frostmourne? Or was it the trap that Mal'Ganis laid. And since he merged with Ner'zhul, who's will was it to kill all life on Azeroth? Was this Arthas? Or was it Ner'zhul? Who is to blame for all of the horrible shit that the Lich King has done. I mean, after he was defeated, and the helm of domination was off of him, a little of Arthas seemed to come back. Was it Ner'zhul the entire time in charge? And should Arthas pay in the afterlife?