You have to understand that there are a lot of people that genuinely like the CCP because under them, there are a lot of people that went from the likes of farmers and factory workers to a serious middle class, with all the improvements to the quality of life that entails. You'd be surprised what people are willing to forgive in exchange for this.

The CCP monitoring program also extends far beyond the country borders as well, and while they would not dare do an extraordinary rendition for pissing off the CCP, many expats still have family within Chinese borders that are completely fair game for the CCP to do as they please with. So many expats won't risk it. The CCP are already known for fucking with families just because some of its members have expatriated. And they don't have a limit to how far they'll go. Concentration camps are nothing new there.