How can you complain about Missile Defense system? I look at it more like a Bullet Proof Vest.
Reagan’s Star Wars vision was for everyone to be protected from ICBMs rendering it obsolete.
The argument is you can make a first strike and then defend against a retaliatory response. Guess it sort of makes sense in an insane sort of way, because Reagan offered to create the defense and share it with the rest of the world.
China is really afraid we will use the THAAD system to stop them from attacking Japan, if they choose to do so some day as a diversion from their internal economic problems. They don't like to lose any tactical options - even unrealistic ones.