People suspected the NSA were snooping and introducing backdoors and proactively places countermeasures against that. Why should the standard be different when it comes to China?
* NSA is a governmental agency that by construction is tied to the state. Bytedance, Huawai and Tencent are privately owned companies in China and all "ties" to the Chinese governments are unsubstantiated. Blanket ban on private companies because of their country of origin and unsubstantiated suspicions results in clear discrimination and suppression of open competition in my mind.
* For my understanding, could you help by providing context on what specific counter-measures have been taken against NSA's intelligence effort based on people's suspicion?