This is horrible but I think it's worse than people realize. Because this is the type of thing used to motivate world wars. Where hundreds of millions work hard to murder each other. Maybe try to find another way to stop it.
But this could of course trigger massive international pushback in the forms of sanctions and boycotts etc, and those will unfortunately trigger even more nationalism and tension, which could eventually lead to war. In the end, there is just no way any regime treats people like the Chinese treat Uighurs without consequences.