"Honest Abe's a 'mo!" - Hank Venture from the Venture Bros.
While I really, really enjoyed Ultimate Hulk vs. Wolverine, please don't try and take that comic seriously in any way.
There was a delay of YEARS between issues 2 and 3, and the writer basically decided to have it go completely off the wall in the remaining time. We are talking random spirit pandas, Logan surviving a nuke, Logan carrying on conversations as a disembodied head... do not apply logic to it.
Whoever appeals to the law against his fellow man is either a fool or a coward. Whoever cannot take care of themself without that law is both. For a wounded man shall say to his assailant, "If I Live, I will kill you, If I Die, You are forgiven." Such is the Rule of Honor.