Politically, it can't. Because it's done way worse shit inside its own borders, against people, whom it has a moral responsibility to protect, and legally, too, by being a signatory to various un human right conventions. The us invasion of Iraq and Afghanistan were shitty but you would be very hard pressed to argue that it was a systematic killing and erasure of culture, considering how many people the US military didn't kill.

By contrast, china is actively erasing uighur culture, for example, by domiciling han men with uighur women (I am being too kind. What is going on is rape), systematically killing uighur men, and repressing language, banning religious gatherings, etc.