Several highly-educated Mainland China associates and colleagues have shared such thoughts with me and expressed general disdain for the HK protestors.
https://www.youtube.com/watch?v=SsWa9fieWSU
This interview was in Melbourne, Australia. Many of the interviewees were mainland students in Australia.
Not saying your associates and colleagues must be like one of them. Just offering one possible explanation.
You can also test their knowledge, by asking them about the Five Demands of Hong Kong protestors, and also Hong Kong legislative and government structures. Some of the answers can be found in the original article.
Props to China though for having a pretty effective system.