That's not how I interpreted it. I read it as "they let him be the scapegoat" because he was caught by the crowd and the gang won't rescue him. The people beating him are the ones who caught him, not his own gang.
Also, gut instinct is telling me that that comment is heavily racist/prejudiced. The Chinese government executed a number of Uygurs less than a week after the most recent ethnic clash. No leniency on sentencing; closed legal proceedings. Furthermore, some Uygurs were previously handed over to the U.S. government on suspicion of having ties to terrorism. After being detained for years without due process, they were eventually released after the U.S. government found no grounds for holding them. China did not accept them back into the country, so they were relocated elsewhere. That is not the sign of a government that "favors" this minority group.
There is an advocacy organization that operates on behalf of human rights for the Uygur group, and they have more information on the subject:
http://uhrp.org/
Edit: Part of the racism/prejudice against Uygurs
may be purposely incited by the Chinese government itself as a means by which to keep the minority group under control. The news media in China is government run, and it showed bias in its reporting of the riots in 2009, framing the context such that only the Han were victims and Uygurs were always only the perpetrators. At the same time, the government made vocal statements about its commitment to helping minorities and hearing out their grievances, which may have given the rest of the population the impression that the minorities were receiving "special treatment" and yet were being ungrateful by being continually violent towards other people. This
may be a form of prejudice that is indoctrinated, which may be the hardest to change and the most dangerous.