What happened in China during the Cultural Revolution is on such a different level of awfulness it just isn't even the tiniest bit comparable to anything controversial or problematic happening in West right now. Even today what is happening in China, and even the freer parts like Hong Kong, is still far removed from issues in the West. Even as a "thin end of the wedge" argument it's just weak.
It hurts legitimate and necessary criticism of actual authoritarian countries and it hurts legitimate and necessary criticism of real issues (such as that raised in the article above) in free, Western countries.
There is a nice sort of proportionality to how everything is hysterically overdone and out of proportion!
That said everything is on a sliding scale here, and the worst enforcement of orthodoxy on the mildest offenders can certainly be compared to much lesser attacks if they stem from similar impulses.
If you cannot make a comparison of this sort then the world would be a place with unconnected events and patterns, and no real way of defining or discussing how situations move from a not bad condition to a very bad one, or in the other direction.
There would never be such a thing as warning signs or worrying trends, because those things would not be relatable to absolutely awful things they might lead to.
Conversely if you were living with awful things there would be no reason to discuss how they could improve, because the improved version of life would not be comparable. How can you make legitimate and necessary criticism of actual authoritarian countries if you cannot compare bad with less bad?
When I looked more deeply in to it, the only mentions of people being held hostage came from far right sources, such as the youtube channel you linked, with little credibility.
Watching recordings of what happened it's hard to take you seriously when you say people are being held hostage.
It can simultaneously be true that the West is a long way from communism and that these scenes look a lot like what happened in times when communism was seriously tried. These are the same dynamics that got out of control and into the halls of power.