I don't know what you're talking about; the US is the least-censored country on earth. You can't even pull provable, inflammatory falsehoods off of Facebook without people crying censorship here (which is its own problem).
> there have been articles of china's demise for decades now
I'm not talking about its demise. Quite the opposite. I'm talking about its people being smarter and more worldly than they get credit for, despite president Xi's very best efforts to the contrary. It has academics who are regularly imprisoned for criticizing the government and advocating for personal liberty. Scores of people cheat around the latest propaganda app (https://www.nytimes.com/2019/04/07/world/asia/china-xi-jinpi...). People use GitHub, for lack of better options, to exercise some small amount of free speech (https://www.npr.org/2019/04/10/709490855/github-has-become-a...).
There's a will. Chinese people don't want this kind of country. Many of them have just given up fighting it. We could help.
> I'm betting it will have as much support as japanese internment had in the US
Japanese internment has been looked back upon as one of the greatest human rights transgressions the U.S. has ever committed. It wasn't at the time, of course, but that can't be helped. It's also beside the point. I'm not saying "America is good and China is bad". I'm only saying, Xi's ruling party is bad. America has done some bad things too. It's still doing some bad things, like what's happening at the southern border.
Maybe what you don't grasp is that Americans are free to criticize their own government. We can have our own sets of values. I have a pretty low view of my own country right now. That doesn't mean I can't also point out China's problems and America's opportunity to do something about them. Of course, I also have very little faith in my government to take that kind of opportunity right now.