I was in China last month, our hotel had CNN. As soon as it reached the segment about Hong Kong, the channel just blacked out. About 10 minutes later it came back on as if nothing happened.
Why be scared of external opinions? You do not see that as censorship? Suppressing history is censorship.
You are basically calling the Chinese populace a bunch of idiots who would not know how to make decisions for themselves.
This is why
the rioters in other cities also got the idea from news media.
News media and social networking blackout on the riots when they started would likely have stopped the riots happening in the other cities. Because the democratic UK had little taste for such media control the situation got very out of hand. Thats part and parcel of being a democracy eh.