The point is that the factors that led to these crimes are all still there. Were the circumstances to arise again there is scarce doubt history would rhyme or repeat.
US is still in Irak now... It's really not hard to find where the US is military active.
The US jail population is 2 M, China, 1.5 M. It's little stuff like this that make the US look worse than China.
Be sure that once China is finished killing Uyghur they will say that's an old story like ... hum ... the US. So yeah continue justify crimes, just remember one day, it could be your turn.
China does all those things today. Your point makes no sense whatsoever.