They have always said, for many many years, that they will only nuke someone in retaliation of violations of sovereignty. I find it extremely odd that the US is allowed to have 5x the number of nukes as the rest of the world, most of them pointed like a loaded gun at someone's head, and is also the only country in the world to have actually dropped two nuclear bombs, but other countries somehow are not allowed to develop the same capabilities to protect themselves.
So you tell me, if I camp outside of your house with 5000 loaded guns trained on such, are you not going to try and protect yourself?
First of all, it was the US/UN who convinced SK and Japan to get rid of their nukes, and pay the US for protection, so no, it's not Japan or SK's problem - money grabs for the military-industrial complex have consequences, meaning sometimes if you offer someone a service, you are expected to deliver.
I would think that countless nation building forays in Latin America, the ME, and SE Asia would teach you chickenhawks something, but alas, someone has to carry the torch for Bechtel and McDonnell-Douglas. Funny how every time regime change is deemed necessary, it's with a country that doesn't have Bank of America and a McDonald's on every corner. Western Capital accumulation for private business funded by the US taxpayer.
It will be so great because then we can all bitch and whine about a new surge of refugees coming to commit white genocide.