"China" is a place, which is an origin of hacking attempts detected by some users, which could be of known or unknown origin (i.e. people who are pink or AI)

"Black" refers to an ethnicity of a given group of people. Or their skin color, if you want things simple.

These are non-interchangeable terms, so by asking to switch them you are indicating they are interchangeable. You are doing this because you think it's important to keep people from blaming an individual based on group membership.

Yet, it remains that the CPC is something else beyond a person, a culture or a people. Defending it is irrational, but maybe people want to stand up for something important to them and think that defending everything's right to exist and speak its mind is more important than existence itself.