You mean other than the motive to survive a US invasion?
Last time I checked, the “enemy”, from the NK standpoint, was themselves (aka ‘South Korea’)
Yes, because it’s both effective and humane to starve a population. Just look at Israel success with Gaza.
So, in your thinking, it’s more “humane” for the NK regime to continue abusing its own people?
Besides, “starve” is a simply a euphenism for isolation which weakens a regime and (hopefully) leads to internal revolution. That is very different than the Israeli strategy in Gaza.
You have a very interesting way of looking at things. I don’t share it.