It's very simple, really.
What would you rather do, OP, let our allies get attacked by a country that's been building up for a war for roughly 60 years? North Korea's been waiting until the 'world police' ie: the UN (ie: Amurica) has leadership that they think wouldn't do anything about it?
Maybe we'll stand and fight it now, but in ~20 years, China will invade a couple places, we'll do nothing. North Korea will take over South Korea, we'll do nothing.
A couple generations after that, assuming America even exists, they'll own us. Foreign powers already own our ports, highways, etc, and you shouldn't be worried about a nuclear war. We've been getting rid of our nukes, not working on new technology with nukes, etc, and that's why we don't like North Korea. They're 60 years behind, yes, but we've done nothing while they've caught up. And a single nuke, or a dozen nukes, will do plenty enough. Sure we have 1000, but in all this time we don't have a real deterrent or defense to nuclear weaponry.
I hope it doesn't come to war, but at this point, honestly, you should join me in welcoming the nukes.