When training and development are mandates like forcible shaving of beards and forcing pork/alcohol upon these people, it's less about training/development and more about erasing individuality, religion, and thoughts that don't conform to the nation-state. This may be less violent than directly killing these people, but it's just as cruel and the world should meet such cruelty with resistance.
So do individual killers...which is about as relevant.
If the US government was threatened, the plan is the same as it always was. Lock everyone up who is tacitly related to the "others" eg American Indians, Japanese internment, McCarthy.
I (and many people I know) would stand against this internment and join protests in the streets to put pressure on the government to reverse such a ridiculous blanket action. Regardless of what the government does to preserve their self interests and power, these actions are wrong and I will do what I can in my power to oppose them.
You realize that there is no blanket action and 95% of Muslims and Uyghurs aren't arrested? Don't just listen to propaganda. Millions of Uyghurs are living regular lives. The current top actress in China is a Uyghur, an Uyghur just won the Rap of China, the situation is nowhere close to Japanese internment. The people targeted are the ones who had suspected contact with Wahhabist extremists. The process is non-transparent and probably incompetently executed but that's a function of China's immature and authoritarian justice system.