How? The Kims virtually have entire DPRK as their personal backyard. They are gods there. They define the laws, have not 100% but 200% control on a massive military that feeds a military acquisition hunger at the cost of basic food and other facilities in the entire country. Even sitting on a piece of paper showing Il's face is considered equivalent to Taliban's blasphemy.
In such a case, how can starving, weak and poor innocent North Koreans even consider a revolt? Your active support of this insane regime throughout the Cold War has been causing so many millions of North Koreans suffering endlessly. Your government claims that it is for the people and for the poor, but how can you see so much injustice and pain in a fellow-Communist country? All the money you might send in aid straight goes into the pockets of the Kims who fatten on international luxuries while their people have to be grateful for two square meals a day.
I don't know how Il Sung was, but Jong Il and his sons are definitely sick; torturing their own people like this daily.
Right now, ONLY your government has enough leverage to replace the Kims with someone more reasonable and empathetic to his countrymen. So do something.