Also, China was an ally. Some of the worst stuff happened under the old Republic - they pretty much had a policy of genocide against Tibetans in Sichuan. I don't remember if it was actually the KMT (or some of the warlords who allied them), but they were quite brutal. Then the KMT fled to Taiwan, and the CCP became the "bad" guys.

While the CCP has a mixed history, they do relax the One Child Policy for ethnic minorities (I think Tibetans are allowed 2 children), so it's hard to suggest they are actually genocidal. Nationalistic, yes, but that nationalism recognises the rights of minorities (as long as they don't try to rebel). They did a lot of dodgy stuff in the Cultural Revolution, but it's not like they are given a free pass on that.

I'm not sure about the Great Leap Forward, but that was more an outrageously stupid policy decision than a deliberate crime. It only lasted 3 years. While Mao should have ended it sooner, it's not like he kept it going for 10 years, like the Cultural Revolution. Perhaps it really took 3 years to weed through the false reports of progress, and to realise it wasn't just growing pains, sabotage, or natural disasters. Besides, it wasn't really targeted at any ethnic group - all rural Chinese were hit pretty hard.