It doesn't work like that. Catalonia was recently told where it belongs, and Scotland before that. Considering the interests of "free people with rights", one cannot put them above the interests of China because it is China that dictates order and law. The USSR no longer exists and Xinjiang is absolutely China.

Russia terminated Chechen rebels until Western nations started acknowledging them as Chechen terrorists. Despite this, the issue of radicalism in Russia remains unsolved. China's implementation of strict authoritarian measures indicates they are avoiding the mistakes made by their northern neighbor and addressing the problem at its source.

I'm not worried about the Uighurs. Their religion and culture will not disappear. But their future generations will have to live by Chinese rules, they will become Chinese themselves. Organizations like World Uyghur Congress and Campaign for Uyghurs, sponsored by EU and US money, spreading anti-Chinese propaganda, will cease to exist, as soon as the flow of free dollars dries up.