An assumption. Most likely a bad one.
Kill their leaders now! The people are starving and living in inhumane conditions. DPRK has no particular friend in the world that I know of. South Korea, much like west Berlin, would accept the responsiblity for reunification with a free North Korea.
I don't know. Are the N.Koreans even salvagable as a culture after all these years treating Kim Jong Il and his daddy as gods?