We Hold These Truths
The Han dictatorship requires total control over the lives of everyone and the erasure of non-Han cultures, i.e., Tibetans and Uighurs. This is monstrous and represents the same collective insanity as the German National Socialists of the 1930s-40s. They can't just outright kill them because the world watches to some extent but they can do everything else to them and get away with it.