NK has threatened to nuke the US and South Korea before. They were ignore by most. But this time is different, I think they actually have evidence of nuclear weapons being tested. NK hates the US, but they’re not stupid enough to nuke the US immediately. It’s still South Korea that’s the main point of tension. I highly doubt the other Asians countries would side with NK if they attacked South Korea. The US would offer support as well if that happened. NK is still just giving empty threats, their nuclear technology is barely developed enough.