From the non-Zenz evidence I've seen that didn’t seem like BS, it does seem like China had an anti-Islamic terrorism program that does result in muslim minorities getting detained for rather arbitrary reasons with no clear date of release, which I’d say is not good.

Also kinda sucks that a lot of the Muslims in eastern China are members of ethnic groups that straddle borders with other countries and China has weirdly strict immigration laws (something even most of the really hardcore China stans admit is true) meaning members of extended families have difficulty staying in touch, traveling to visit or immigrating.

Nothing going on there is a fucking genocide though, at worst it’s an excessively heavy handed counter terrorism program.