USA is probably civilised only in last 60 years or so. Otherwise the country was far too overtly racist and oppressive to minorities.
Uighur muslims are just a million or so and minuscule on larger scale. Also, it might be better to de-radicalize them now before they start bombing your cities. For example if USA had not armed Osama Bin Laden, 9/11 was avoidable. China is taking precautionary measures to avoid future wars and terrorist attacks like 9/11.
