China is an authoritarian one-party state. There might be a difference, but it's pretty slim.
China is a culture with a very long history, like all cultures, and a diasporic population, not to mention all of the Chinese people under the rule of the Republic of China on Taiwan.
Confusing the PRC with the entirety of Chinese people, Chinese culture, and China as a whole is rather similar to refusing to distinguish between Nazis and Germans, and only serves to either make criticism of the PRC impossible, since one can always accuse the critic of racism, or make defense of the Chinese people and culture impossible, since it will be taken as burnishing the PRC.
I am, however, claiming that the CCP is massively intertwined with mainland Chinese people. See this article that explains this in more detail: https://oxfordpoliticalreview.com/amp/2020/04/24/china-serie...
So if you say "I am against CCP, not the Chinese people", then that statement only makes sense if you exclude "many many mainlanders" from the definition of "Chinese people". Which makes the statement rather weak, or even nonsensical.
You say that if we accept this intertwine, it makes criticism impossible. Not so. You can still criticize the CCP, but you need to be more nuanced with your criticism, do more due diligence instead of merely rehashing western narratives, and realize that you're criticizing the CCP and the people at the same time (which could be entirely legit).
I therefore argue that recognizing the CCP - mainland people intertwine is a good thing, as it makes criticism more honest, more accurate, and possibly more helpful/constructive. No longer can you put all the blame on "just the bad guys" -- all of us mainlanders are complicit in some sense. We all own the problem, so we can't stop at just blaming, and have to actually find a solution.