Well, it's not hypothetical, we already did it during WWII to Americans of Japanese ethnicity. And newspapers across the US spoke up against this atrocity [1]. Contrast that with China where the newspapers are forced to push the government's narrative, and invariably focus on the terrorism in 2014 that sparked the CCP's disproportional response rather than the barbaric violence perpetrated by the CCP.
The US government has formally apologized for the atrocities in the concentration camps where Japanese-Americans were held, and paid reparations ($42K per camp survivor in current USD). We vowed never to do something so horrible again. But in 2019 China is still playing with mass forced incarceration, and they even have the gall to call it a model for combating violence that other countries should follow. The CCP has replaced the Japanese empire in abusing their own population (but I think some in China are racist and view Uighurs as not part of the Chinese people, just like how Nazi Germany viewed the Jewish people, and how some in US during WW2 viewed Japanese-Americans).
[1] https://slate.com/human-interest/2015/11/protests-against-in...
I'd argue that's not hypothetical at all, even with Xinjiang the US has by far the highest rate of imprisonment on the planet both of adults and children.
Most are black. Vast majority are not violent crimes.
It's entirely out of step with the rest of the developed world.
https://www.washingtonpost.com/resizer/uKLej0KwcfGN583uqvyfQ...
Source: Bureau of Justice Statistics
I've noticed a massive apathy amongst Chinese towards Xinjiang, the vast majority don't care and think they deserve it. Perhaps you have a lot more in common than you think.
Both countries have horrendous records and many from there feel not the slightest bit of shame about it.