According to the Chinese government, 80% of Chinese netizens agree with the block on Facebook. For other perspectives, see these “tweets” from Chinese netizens, translated by CDT. From the People’s Daily article, which also helps explain the reasons for the Facebook ban:
On July 8, Huanqiu.com revealed that “Xinjiang independence” activists are using the famous US social networking website Facebook to facilitate their communication worldwide. The news immediately triggered a boycott by Chinese netizens.
Over 90 percent of Huanqiu.com netizens said that “Xinjiang independence” activists, carrying out this type of “online activity” severely violates China’s national interests and agreed that Facebook should immediately shut down the “Xinjiang independence” online group.