We will have to use nuclear weapons against North Korea and China?
Are you nuts?
Well...it's destiny. What other options do we have? Wait until Los Angles is evaporated?
Destiny- to nuke China?
Which has hundreds of nukes that can reach the United States?
That is not 'destiny' that is insanity.
Even North Korea- as asshole of a regime it is- is unlikely to actually attack the United States- since the only thing fat boy cares about is staying in power. He certainly will use nukes if his personal safety is directly threatened- but he also knows that the first time he drop a nuke on the U.S. his existence has a duration of minutes, not even hours.
So what do we do? Continue negotiations, build more THAADS, test them more vigorously.
Not just nuke China.