I don't think a nation survives without putting in place the means to make peace neither. Otherwise it is caught in an endless war that will drain valuable ressources until nothing remain.
Ethics isn't about being weak. It is standing firm on principles that make the core of your identity, that you will be able to share with your friends, your ennemies and make you someone trustworthy in your alliances and future truces.
Being, like the Japanese would say, honorable.
The X-men have been created by Xavier to be role-models. Are they really at their place in the Krakoan society?