Just let them starve to death.
http://www.japantimes.co.jp/news/2017/06/22/national/politics-diplomacy/ishikawa-governor-backpedals-comment-north-koreans-starved-death/#.WUvEDGhUuf3
>>130929455
Have you ever raised a child, hoping they will be a success, but knowing they will become a failure?
It's like that.