Western nations have no desire to take over North Korea they do want to stabilize the region and remove global threat. If the fat kid were to negotiate in good faith and drop his hostilities I doubt there would be nothing but good things for the North Korean people. The real issue for the fat kid is holding on to power which means oppression and human rights violations.

The solution might be to tell China, you can have North Korea. China gets its buffer zone and what little resources the North has and the world gets stability.