Its important to be civil, and not point out the fact that the CCP have murdered millions of people. That would definitely be an uncivil flamewar comment.
No, it's important to be kind and thoughtful, avoid calling names, post substantively, and do the other things that site guidelines ask. They aren't hard to understand:
https://news.ycombinator.com/newsguidelines.html
Denunciatory, flamey rhetoric obviously doesn't meet those criteria.