Exactly right. Just like Captain Ahab from Moby Dick. Khan couldn't leave well enough alone. It's also interesting that Captain Picard from ST: First Contact had a very similar viewpoint of the Borg. However Lilly manages to convince him otherwise, saving Picard from making a very possible, and deadly mistake. Vengeance -no matter how you look at it or justify it- will always in some form or another, bring down those that blindly rely on it. And Because Khan is genetically superior in every way, this fault made it even more difficult for him to see reason when hyped up on anger and arrogance. Joachim (Khans second in command) didn't like Kirk either. However he felt differently then Khan did and could see where his leader's actions were taking all of them--A road that he didn't want to travel down any further. They had escaped their exile, stolen a starship and acquired Genesis. In Joachim's mind they had all that they needed to survive. So we also have this interesting confrontational dynamic between Khan and Joachim as well.