It is perfectly acceptable to call out flaws in US culture, why should it be different for China? What does race have to do with it? Do you see anyone claiming that Han people are genetically predisposed to forging research papers?
When discussing US "culture", one usually has at least enough nuance to discern left from right ("us" vs "those idiots") in a population of 300 million.
When discussing China, there is no distinction. All 1.4 billion people are the same.
