They've threatened use of WMDs against Israel (since that is the only country they can reach) if the USA interferes.

Ok, so N.Korea is getting a little off-topic.

But considering that they have just announced that they are considering pulling out of the 1952 armistice with S.Korea (technically they've been at war still for the past 50 years), and the Director of the CIA stated last week that intel points to N.Korea being able to hit the US' west coast, how would that shift your viewpoint?