"Why would an adult not hit someone when that someone hits them?"

Some people believe that not retaliating stops cycles and systems. Some of us have principles beyond the very childlike, "well, they did it first".

If you believe state censorship is bad, you should oppose it when it is deployed, even if it's deployed against someone you think is also bad.

Like, I think using slurs is bad. I oppose using slurs, even against people I loathe. I have a principal, and I do not violate that principle even if it would hurt people I would consider my opponents.

Same here. My commitment to my principal that "state censorship is bad" far outweighs any feelings about China.