In fairness, they are just blowing hot air. I've hung out and gotten drunk with more than a few UN folks, including one of their special units. To the last man, they'd rather cut their own throats than ever invade the US. We have an international reputation for being both exceedingly passive (fat, stupid and lazy), but also for exceedingly aggressive whenever we overcome our passiveness. Not saying I agree or disagree, but that is our reputation.
Honestly, I see no advantages to playing nice to folks like this or the international organizations that promote this pointless rhetoric. The only proper American response is to ignore them and refuse to validate their hypocrisy. Well, the true American response would be to raze the UN building to the ground and salt the earth, but I'll settle for less.