On the streets of the cities and towns of China’s northwestern region of Xinjiang you can hear complaints from the Uighur minority group about restrictions on the Islamic religion they practice, their Turkic language or their culture, which is most closely linked to the lands of Central Asia. But in interviews in Urumqi, the regional capital that exploded with ethnic rioting last week that left 184 dead, the single most common complaint of Uighur residents is that they feel excluded from economic opportunity