China is screwing Europe economically. The US could have worked with Europe to counter China’s cheating, instead, Trump declared economic war on everyone at once, and bowed to China because China was too strong for Trump to take on alone.
Chinese leaders believe in Marxist Leninism. They believe that the world will inevitably become Marxist and their Leninist party can speed up this great end. They believe that China deserves to be the world’s greatest power, that it once was, and that it will be again, and the Chinese Communist Party will lead China to this greatness while at the same time leading the world to its Marxist future.
Schools in China can no longer teach primarily in an ethnic language. Mandarin must be the primary language in all schools. China is more generally cracking down on ethnic minorities in its ethnic unity law.
China is a colonial empire that has conquered its land by force, and it is stepping up its forced assimilation of its formerly conquered peoples.
Officially, North Korea no longer seeks unification with the south. Trump blew his opportunity in his first term to get closer relations with North Korea, despite holding hands for the cameras. North Korea has deeply allied with Russia, giving North Korea advanced military technology.
Limited patriot missiles may not hurt the US too much in a war with China because China will likely overwhelm patriot batteries, and destroy those batteries in one day. Without batteries to fire the missiles, the missiles are useless.
One reason the US does not build that many missiles in a year is because the fuel in missiles degrades and makes the missiles too dangerous to fire, meaning, if we build a whole lot during peacetime, most of the missiles will go in the trash along with the piles of money it cost to purchase them.
The USA is losing its military dominance. It is not adapting fast enough to changing technologies that make killing Americans in war easier. Still, there are many military objectives it could achieve over potential enemies, but the US is not willing to take the casualties necessary to achieve those objectives, and America’s potential enemies know it.