i don't think you are being harsh, and no, nothing good is going to come of this (or has for the last 60 yrs), but you have twice used the verb "allow" as if the world has control. they are an independent nation (as messed up as they may be). ultimately, people can do whatever they want. usually there are consequences. of course, depending on how you do it and where you do it, the consequences may be that you end up on death row or leader of a "movement."
global politics is a very difficult chess game. as fun as it sounds, we really can't (that is, don't want to) send in the big guns to take 'em all out. we can pressure them, but as has been stated, its the poor and disenfranchised that lose, not the leadership. as naivee as it sounded when posted earlier, encouraging change from within is probly the most enlightened act, though in this case (as well as other oppressive regimes) it is not likely to result in much.
can you imagine a starving, disgruntled populace that is so scared it won't revolt? creepy stuff. the NK government is backed into a corner and they know it. thus they fight back harder.
so yeah, i will join the chorus, "ouch!"