Sanctions?

So let me see if I understand this... we invade Iraq because "intelligence" informs us they have WMDs. Oops, no WMDs, intelligence was wrong. But we kill over 600,000 people. North Korea tests their first nuclear bomb (a WMD) and we are just going to sanction them? I am not saying we should go to war with North Korea, but what sort of logic is government trying to feed us? Is anyone else getting really tired of what we are being spoon feed by our leaders? Everyday I begin to think that the Prime Directive from Star Trek makes alot of sense.