Ethnic riots like those in Xinjiang July 5-7 and in Tibet in March of 2008 differ markedly in origin and nature from mass incidents, XXXXXXXXXXXX emphasized to PolOff on XXXXXXXXXXXX. Both present serious problems for the Party, XXXXXXXXXXXX said, but the Party leadership would not hesitate to open fire on Uighurs or Tibetans if they deemed it necessary to restore order. Mass incidents pose a different kind of threat, he said, as the leadership is "afraid" to fire on Han rioters for fear of sparking massive public outrage that would turn against the Party. XXXXXXXXXXXX told PolOff on XXXXXXXXXXXX that the Xinjiang riots and the June mass incidents were different in kind but shared an important similarity. In her view, at least some rioters in Xinjiang took to the streets because of general discontent unrelated to the immediate cause of the violence. Han people do not hate Uighurs and are not looking for revenge, she said, but some people "can always find an excuse to express their grievances."