Actually, I could even see Canada playng a role here. If we consider that China is just as sick and tired of North Korea as the rest of us are, but that the main concern is with the fallout from a collapse of North Korea's social structure (after all, unless a regime change goes smoothly, you're bound to end up with anarchy, and you don't want that in a nuclear state!), then I can see Canada offering a kind of olive branch whereby if China withdraw from any formal alliance with North Korea, that Canada will offically establish friendly relations with North Korea.
Before anyone jumps on my words here, we need to consider the difference between a friendly and an allied status. As allies, we are bound to one another by treaty. As friends, we do look out for one anothers' interests, but unlike in an alliance, we won't condone everything they do. If that happened, North Korea would gain a friend but ose an ally. This would make it such that North Korea could gain more by working with us (new friends can mean new trading partners) than against us (without allies, it has no one to fight on its side, unless of course it's unjustly attacked, which is a whole different matter).
As a result, standing without allies, North Korea would tone down the rhetoric a little. On the other hand, with a new friend in Canada (referring of course to friendship with the North Korean people and not necessarily approving of the regime), more open tourism opportunities could open up for both dies, making it easier to travel, etc. This would also help promote an exchange of ideas at the grassroots which would bound o influence their culture gradually.
The little Hitler regime in NK has to go. Either peacefully or by annihilation.
Sure, but I don't think its neighbours would be too happy to have nuclear clouds floating around in their skies. We can only control the weather so much. Consider too that many South Koreans still consider North Koreans as part of their national family.
Just ook at Chernobyl. Let's not forget the cold war was still on then, yet when nuclear clouds started blowing about, just look at how quickly all differences were temporarily dropped out of common self interest on all sides. Regardless what all sides thought of one another, they knew that it was in the personal best interest of each nation to clog up that melted reactor. I somehow don't think South Korea and Japan and China and Russia would appreciate a nuclear cloud in their midst.