Non-Muslim Uyghurs who make themselves useful for the government don't seem to be doing so bad for themselves, from Shohrat Zakir, the chairman of Xinjiang, down to Uyghur prison guards who have been called out by some Kazakh victims as especially brutal. (Why do people forget about Kazakh and Kyrgyz Muslims in Xinjiang so often?)

And the "anti-extremism" push certainly applies to Hui Muslims as well, who had their mosques "renovated" to look less like mosques: https://text.npr.org/s.php?sId=763356996

> Non-Muslim Uyghurs who make themselves useful for the government don't seem to be doing so bad for themselves

The fact that certain individual Uyghurs are not targeted is not evidence that the reason oppressed Uyghurs are being oppressed is not "because they're Uyghurs". It's evidence that being a Uyghur can be mitigated.

But if you prefer, "because they are members of a group with very questionable allegiance". This phrasing picks up the other Turkic groups in the area while still clearly excluding the Hui.