What he did is to let Chinese people believe in one person as their savior. Whereas people should rely on democracy, liberty, and rule-of-law.
When monks and nuns are singing revolutionary songs, you should realize that Bo is brainwashing and enslaving people, instead of letting them know all the information and therefore be able to choose their own lives at free will. He is a bigger evil who killed many smaller ones.
For thousands of years, Chinese people are fooled to believe that government should control their lives. Whereas government should serve its people, not behaving as people 's mum, as a famous "red" song says.