Even though China is a main trade partner with North Korea, they would sit on their hands if we bomb the snot out of N. Korea. They (China) do more business with us and have no personal attachments to crazy boy. Therefore, take out the weaponry at the DMZ to keep the south safe and, simultaneously, carpet bomb the capital. With our arsenal, it would take 1 day.....tops.
Then, if we cannot de-program the populace who will think that we just killed God, keep them as laborers.
N. Korea is way too unbalanced to be left unchecked. They need to go.