Don't forget the old king has enough experience to know he can weather out the storm. It might seem unconventional at first, but this is pretty much the only option US has to suppress China( excluding ofcourse kaboom). The liberal policies toward China might sure have been looked at as charity by people in power back when it required to be lifted out of poverty, and by strategists as a way to increase probability of China going the democratic way but now costs far outweigh the benefits. Any increase in China's economy or technical capabilities directly pits it against US.Rationality only works when both parties in the room are open to it. In the current USA-China trade war, only China is rational. The US govt is too far gone and can't back out now. In the beginning it was a trade dispute. But now, imo, it's pretty a bloodbath war between an old dying king (USA) and the young prince who's next in line for the throne (China). The old king has already lost his rationality and succumbed to fear and paranoia. His entire objective right now is to wipe out any potential threats to his seat of power. Even though the tariffs are doing damage to the US as well, he doesn't care and considers it a small price to pay in order to maintain his hegemony.
Can't talk sense into an irrational person no matter how hard you try..
Gotta give credit to China's strategists for using the last 40 years so damn efficiently while US lingered in its Soviet hangover.