All you said are true.
But let's stick to the topic and avoid whataboutism.
Edit:
I saw you have another almost identical comment (now flagged).
Are you feeling that I am deliberately leave out the rethoric that China or CCP were equally brutal, so that you have to raise points about China been the one committed crime.
I find those thoughts insulting, inhumane, and plainly wrong.
I am a Chinese. My ancestors have suffered those brutality themselves.
My grand father still had the memory of the fear he was subjected to during Japanese invasion (not part of the NanJing massacre). My entire life has been haunted by the gruesome deeds that I personally has association with through my people's collective memory.
It was not just the shear number of people killed. It was also the plain animal like brutality performed, whcih terrified my heart. So much so that I avoid sharing those with anyone, online or in person. Just repeating those in my mind causes fear and repulsion to my guts. (Google it yourself at your own discretion)
[1] https://news.ycombinator.com/item?id=25552862