> To be fair China can rapidly setup factories in many countries or just use them as re-sellers.

Then China should setup factories in the USA. Problem solved.

It's idiotic to claim the tariffs on the rest of the world are because of China. CBP has real, non-idiotic ways to deal with incorrect country of origin labeling, and illegal transshipments. See: United States v. Akua Mosaics, Inc. and Kenneth Fleming

Trump's tariffs aren't any lower on countries that have already cracked down on use of their ports for illegal transshipments from China.