That's just the Guardian, an Anglo-American media outlet that poses as 'anti war left' while supporting every. single. war. and foreign policy of Angloamerica. No need to even mention other major Angloamerican outlets and their uniform adherence to their establishment. Its just a smear, like how the Angloamerican media smears every enemy however it can.

There is no way that every single muslim country can back China. There are those who absolutely don't need any economic ties with China due to their size, the amount of oil or other resources they have. So its just nonsense. If there was an actual 'genocide', nobody could be able to prevent Islamist groups from flooding Xinjiang anyway.