I started reading this comment right after reading OP's "Is there any truth to those claims or is it all" question; with you starting with two "yes", I've been frustratingly reading this comment waiting for the bad take until I realized you were answering OP's title and there was no bad take.

To add to your answer, my go-to is often this open letter to the UN (PDF) from 51 states having freely inspected the deradicalization efforts in Xinjiang. I quote:

We note with appreciation that human rights are respected and protected in China in the process of counter-terrorism and deradicalization.

We appreciate China’s commitment to openness and transparency. China has invited a number of diplomats, international organizations officials and journalist to Xinjiang to witness the progress of the human rights cause and the outcomes of counter-terrorism and deradicalization there. What they saw and heard in Xinjiang completely contradicted what was reported in the media. We call on relevant countries to refrain from employing unfounded charges against China based on unconfirmed information before they visit Xinjiang.

... in the end they either realize it's bullshit or their new position becomes "China made them say that" which basically means they're arguing China can control over 50 countries including among others Algeria, the UAE, Saudi Arabia, Russia, and Venezuela; you know, clownery. At this point mocking them is an acceptable strategy; they won't take it well but it'll rattle them and increases the chances they'll feel embarrassed and end up trying to look it up by themselves soon after.