They are deliberately and consciously exterminating the Uighurs. Cultural genocide is slow-motion genocide. Genocide isn't just rounding up all members of a distinct racial or ethnic group and killing them , it is also the slow destruction of said group's culture. Culture is what binds a group, and makes it a distinct entity. When you destroy a group's cultural distinctiveness, you are removing that which makes the group a group. The Chinese are restricting the Uighur's ability to survive as as distinct group, with the intention being to forcibly assimilate them into the Han majority, which would mean the extinction of Uighurs as a distinct racial group.