Bring it on North Korea?

I don't get it, we thinks Iraq has WMD and they treat their people badly... we attack. North Korea definitely has WMD and treats people poorly. Why we not attack? Oooooh, that's right, me forget, North Korea doesn't have oil.

"North Korea isn't the kid in a wheelchair that Iraq was, it's a kid with a baseball bat in his hand, standing on his own."
—AMP