I can't see any discussion of specific US policies that make US protectionism contemptible, while Chinese protectionism, despite being far greater by any measure, is praiseworthy.
In your opinion, what are these specific policies?
USA-CHINESE trade agreements were negotiated taking into account their respective conditions. These agreements were ongoing and progressive, widening their scope as offers were made and mutually accepted..
The difference came when the USA unilaterally revoked some of them by introducing banning list not so much on trade but on individual companies who had a major trading links with American companies.
That went further, Trump banned them trading world wide, and stopped them buying goods that had any AMERICAN content. Such as Google owned soft and firmware.
and chips made using American sourced tooling.
This was clearly designed to damage these companies directly.
However as others have pointed out in this thread. These bans have forced China's hand. Who have now advanced their own investment and abilities in these fields.
This will cause a direct loss to American companies of many billions of dollars a year.
In the process of increasing their own capacity China has taken advantage of investing in the next generation of chips, leapfrogging the the previous American designs.
Rather than harming Chines companies, in the medium term (some time next year) Companies like Huawei will have the availability of the most advanced chips in the world. This of course will damage still further their present suppliers in the far East who use American tooling.
You can say once broken twice shy... In future these companies are almost certain to use the more advanced Chinese tooling. Which in turn will damage American business still further.
In the meantime China has announced that it is preparing it own banning list.
So the Trade War will escalate.
The American position will not improve one iota.
I was notified to day that my Huawei phone will have the latest Android 10 and Emui this month. I have already received their latest replacement/addition for Google search, play, and maps. My particular phone (18 months old) will never need their replacement for the Android operating system, though it is being shipped in the far East.
These American bans will be very costly, but will have the affect of further strengthening the Chinese industry.
Something of an own Goal.