deviants

You just described a genocide, like one of the plain text definitions of a genocide. Mass murdering a group of people to steal their land.

Doesn't matter that you've made up a hypothetical fantasy scenario where they aren't caged in cornered, but have free movement, it's still a genocide.

Oh, and they aren't free to leave, they are caged and cornered.

So you're wrong, and you're wrong again.

I'm not going to ascribe any moral grading to these NK soldiers, for all I know they were forced to deploy against their will, or maybe they volunteered.

Either way, it doesn't matter. They were active participants in a conflict, and deployed within a war zone. That means they were legitimate military targets to be killed, or captured.

I hate this fictional couple already. Despite the fact that they're clearly upper middle class and educated, they're too lazy to capitalize "I", or his name.