Why do some people criticize the people who criticize China?

Frankly I think they are afraid of the truth. The US government is being criticized all the time, just ask the Europeans (and Canadians!) In China's case, there is so little freedom of expression that you see some people talking only about China government being the greatest, as if they're thinking for themselves, when they have been indoctrinated to do so to survive under heavily restricted and ruthlessly monitored freedom of expression.