Saying "there are no rules here" as a justification for anything you did is incredibly nasty and cowardly. The implications are: "sure, I do wrong things - everytone does!" Is that supposed to be an excuse for not making and enforcing rules? Isn't that what that war was supposed to be about? And calling that the American way -- aklsdjsdkn, please, no more straw. (anti-straw?)
Writer, that pseudo logic is despicable in the real world, and here it just looks like using a character as a mouthpiece.
For the record, I'm jut condemning the speech, not Diana's actions.