Rian Thum writes about the ethnicization of Uyghur grievances at The China Beat:
One of many disturbing long-term effects of the recent violence in Urumqi is an increased ethnicization of anger on all sides. Ethnic tensions are of course nothing new in Xinjiang, and ethnically targeted state policies have long made it difficult to distinguish between anti-government and ethnic discontent, but until now Uyghur resistance has been aimed at the state. The recent Urumqi uprisings represent a significant redirection of anger along more clearly ethnic lines.
The interactions between Uyghur and Han citizens vary with the uneven demography of Xinjiang. In the provincial capital, Urumqi, Uyghurs are a minority. This means that Urumqi Uyghurs frequently encounter intense racism, but also that they deal with the Han in a wide variety of contexts, many quite friendly. Uyghurs in Urumqi often draw clear distinctions between grievances against the Han and the government. However, it is important to remember that most Uyghurs do not lead the daily lives of minorities. In Southwestern Xinjiang, where most Uyghurs live, Uyghurs constitute the majority. In rural Uyghur areas, the sight of a Han person is rare, outside of interactions with officials and police who have been sent from elsewhere to implement state policies. It is not surprising then, that in the traditionally Uyghur areas of Southern Xinjiang, the line between anti-government and anti-Han discontent is thoroughly blurred. When expressing grievances, it is not uncommon for Uyghurs in the South to name the Han (khӑnzulӑr), the government (hökümӑt), or even the Communists (komunistlӑr) interchangeably as the targets of their anger.