What was once a grocery shop is now a blackened mess. Two boys in shorts and singlets play in the rubble but the usual occupants are absent. Five days ago a Han Chinese family was butchered in this small shop — victims of the Uighurs who rampaged through Urumqi. Yu Dongzhi described how he clawed through the smoking ruins of the store to search for the family who lived there. He hoped to find his sister, Yu Xinli; her husband, Zhang Mingying; their 13-year-old son; her elderly mother-in-law; and a nephew aged 27. The police helped him to dig among...