I'm also hearing that the Uyghurs are unhappy over the influx of Han Chinese into their areas, and thing the long term plan is to displace them.
We will see what happens when a regime as ruthless as the ChiComs encounter internal Muslim resistance. The only thing that might lessen their response would be worries about a global Muslim backlash against China in general.
China doesn’t care what the rest of the world thinks. The Uyghurs have always been a bit of trouble. The Han move in because they need someplace to go. China feels like everyone just needs to get along. If they don’t get along, it’s the fault of “rogue elements” that will be “purged”. The Uyghurs haven’t been a ton of trouble until now. The LAST thing that China wants is a problem on its western border.
I bet the problem just fixes itself.
According to Wikipedia, the population of Urumqi is 75.3% Han Chinese, 12.8% Uyghurs, 8.0% Hui and 2.3% Kazakhs and Kyrgyz. So looks like the Chinese ethic cleansing is working there.