As a Chinese American (whose family is from the mainland), trying to combat misinformation amongst my relatives feels like talking to a brick wall. There's already no love lost between HKers and mainlanders, even before all this went down. It's especially difficult when Chinese identity is seen as intertwined with the CCP, and any criticism of the government is considered criticism of the Chinese people.
I naively hope for the eventual freedom of all 华人 from the CCP, but people in the mainland are extremely complacent due to their rise in economic status under the current government. The only thing that would cause true mainland revolt and revolution would be if the Chinese economy collapsed.