No anarchist that I know of is organizing efforts in Xinjiang to fight China.

See, I disagree with this. By regurgitating the unverified claims (which some anarchists do), those anarchists are organizing efforts against China. (Edit: Although not in Xinjiang, but that distinction is not important in my opinion.)

While pretty much every anarchist I know in the US spends hours every week organizing efforts to fight the US in one way or another.

Awesome work for sure.

The discussion around China’s treatment of Uygurs is always so unnuanced to me. ... China is a villain and needs to be stopped. China has not and never will do anything wrong. Your criticisms are orchestrated by the CIA.

Tankies don't say the latter at all. We painstakingly and categorically debunk the unverified claims and point out that it's extremely dangerous to promote Western propaganda. That being said, we do not dance around with nuance in this respect, and we cite sources such as the nuanced anti-war takes which perpetuated criticisms against the imperialist's targets. Those nuanced takes completely failed to prevent the Gulf War, the war on terror efforts against Afghanistan, Iraq, Libya, etc. Public opinion matters. Spreading unverified claims feeds the public opinion machine.

My point is that it makes sense to deride the takes of anarchists who promote the unverified claims, but it does not make sense to deride the takes of tankies who fight against promotion of the unverified claims.