Which I acknowledge. He's obviously not above killing in order to get what he wants. Heck, when it looked like all was lost, he was willing to destroy the whole ship rather than be prisoners to these "inferior" humans. But taken all of his actions into account, he didn't kill any of the crew when taking over the ship, and when he threatened to kill Kirk in the pressure chamber he sweetened the deal from Spock joining him to ANYONE joining him to spare Kirk's life. He was not out to just kill people. This new Khan is. Spock Prime doesn't even bother mentioning that the original Kirk and crew defeated Khan before with no casualties, and that the two men came to an understanding with each other before Khan was shipped off to Ceti Alpha 5. But no, he only mentions the events of "The Wrath of Khan", and not even that information was accurate.