Killing them would.
People die. Far fewer will die in the long run if NK's government falls, since I don't think SK will be wanting to keep NK's death camps open.
What control? N. Korea is run by what is essentially a group of lunatic personality cultists. You can't really ever control that, only mitigate the crazy.
And this is just sick thinking. If they were all lunatic cultists, there would be none trying to run the borders. But hey, why bother with that? It's not as if they're human beings, that makes it ok to kill them!
...
No.
I don't know where you got that idea. I quite clearly said that NK is
ran by lunatic cultists. The vast majority of North Koreans do not run North Korea, they are victims of its unmitigated brutality. Hence why so many try to leave, as you said.
1. China would support N. Korea. No doubt about it. It wouldn't simply let super powers - especially ones intent on limiting it's industrial capabilities show up on its borders. It'd be much the same way as the USA would defend Canada or Mexico if someone were to invade either.
I explained earlier that having NK cease to be would be more good for China than not. I can't imagine that China doesn't know that's the case. Canada and Mexico are normal, stable countries. North Korea is anything but.
Anyway, the US isn't really interested in limiting China's industry, nor is the reverse true. The USA and PRC put up a good show, but at the end of the day China and America are linked in a way that can't be severed without economic annihilation on all sides.
2. China doesn't openly support N. Korea. Anyone who ever releases a public statement of defending N. Korea is usually a low ranking general, heavy enough to throw the point across, but low ranking enough that if shit got serious, they could redact any statements.
Even then, PR didn't stop them from liberating N. Korea and "resisting US aggression" before, and it wouldn't stop them again. Not to mention their local police would aid in the image.
"Last time" was 50 years ago and Mao Zedong was still alive then. Remember Mao? Military genius but absolutely insane, ordered the Cultural Revolution and killed millions? Was so off the wall that China completely moved away from his policies after he died?
That they could feasibly retract any support for North Korea shows how trivial their relationship really is. China supports North Korea as long as they aren't more trouble than they're worth, and that's almost changed now even without this hypothetical war.
The worst part? They'd be right by saying they were resisting US aggression if the US attacked.
So what if we're being aggressive? Aggression can be justified. When your opponent runs death camps like North Korea does it is very justified indeed.
Firstly :
If the American army invaded with the S. Koreans, you can bet there'd be hell on the first few weeks.
It wouldn't achieve a lot. The N. Koreans have been entrenching their country for decades, tunnels, bunkers, silos and who knows what else. Heavy weapons, air and navy support would fail to root out the N. Koreans.
North Korea does not have the capacity to sustain a war. You can't fight without supplies, and North Korea won't be able to supply anyone under an invasion. Entrenchment is the last thing they'll be capable of under those conditions.
But it would succeed in doing two things:
*Destroying most of N. Korea, turning the zealots into angry angrier zealots.
Just so I've got this straight. Invading North Korea would fail miserably but somehow also destroy most of North Korea, rendering the populace of angry zealots (who you criticized me of considering angry zealots when I did not) willing to fight to the end with equipment they don't have?
*Antagonizing N. Korea into bombing S. Korea, with a heavy risk of chemical WMD's being used
Making Korea completely uninhabitable. Everybody loses.
Care to substantiate your magical chemical weapon which can render hundreds of miles of land uninhabitable forever and tell me how North Korea got their hands on it? Maybe North Korea deploys mustard gas bombs or something similar, but I don't even think the kind of thing you are describing even exists, much less is it in the hands of one of the most technologically backwards places on Earth.
Secondly :
N. Korea's terrain would be slaughter for troops to cross. Very hilly, N. Korea military installations everywhere. The amount of human lives lost on both sides would not be worth it. Advances would be slow. Very slow. N. Korea can afford to lose more men than the U.N. could.
And what would it achieve? Suddenly you're now facing civil unrest from a meatgrinder that serves no purpose when an armistice was already active. Did I mention the death and destruction part?
Once the rout starts, and it will because NK can't sustain their own forces, moving across NK would be easy enough.
So what does this achieve? Did I mention stopping all the horrible things North Korea does all the time and will never stop doing until they're forced to? No liberty, barely any food, your entire family sent to a death camp because someone thought your grandparents disrespected the Eternal President?
Thirdly :
WMD's. Unless you want to give the S. Koreans national radiation sickness day as a new holiday on the calender, nuking the N. Koreans = bad.
Bad and totally unnecessary. No one is arguing we should deploy nuclear weapons against North Korea. Or deploy nuclear weapons at all, for that matter.
However, if the N. Koreans happened to be losing - terribly, guess what they wouldn't be opposed to?
NK has somewhere on the order of ten nuclear weapons total and no effective launching system. The Cold War this ain't. It is completely feasible to take down NK's strike capacity completely and utterly using conventional weaponry. Learning about things like this is the kind of thing the CIA was made for, so I imagine we already have a plan to cripple NK's nukes if need be.
A constantly brainwashed side doesn't tend to surrender easily.
Thousands of North Koreans have fled the nation, and those are just the ones who managed to escape, which isn't easy. The percentage of North Koreans who are well and truly brainwashed is for the most part an unknown factor.
Tell me about it. We still haven't given up on the whole Afghanistan thing.
It is complacency, more than anything else, that allowed the Taliban to control Afghanistan and still allows North Korea to control its people. It isn't right to be complacent to monstrous regimes like those.
I'm not sure you know how powerful the Kims are in NK government; nor have you been paying attention to the news.
Less than 2 weeks ago, the most powerful figure in the NK military was dismissed by the new Kim. So long as he is careful to maintain the god-emperor status of the family lineage, he can reform whatever he wants.
If he institutes reforms then it will appear to lessen his absolute power. If he lessens his appearance of absolute power then it makes the Kims look bad and he'll be deposed for that. That is why this isn't a problem that can be solved from the inside.
Which means if reform is an aim, he does have to do it very carefully over the course of years, if not decades; anything faster and he would risk a military coup (because while dismissing powerful members is within his power, if the whole army turned against him due to his actions, he would be dead).
Decades just isn't fast enough when your country is committing the abuses that North Korea's is.