So we can only reach stalemate once a country has nukes and otherwise have to start blowing up their schools?

Prior to that, they had thousands of artillery pieces pointed at Seoul the presumed backing of China if the Korean war resumed.

And because China won’t allow it.

The reason people left North Korea alone while they were building nuclear weapons is because they weren't arming 5 terrorist proxies and they didn't have a doomsday countdown clock in their capital city.

They also have the GDP equivalent of JetBlue Airways