No, you continue to ignore the whole immutable characteristics aspect. I get that you don't lie to recognize that part because your whole tautalogical line stops working, but it remains.
So we're back to step 1. Hate speech is only based on immutable characteristics? There's no issue if you target people based on clothes, wealth, sports team, political affiliation, etc? The definition you quoted included religion so was that incorrect?
Like I said last time you asked this: I certainly think it's wrong/rude, but I also don't think there's any news to remove such speech, as the negative impact is minimal.
Great, then Google is not removing hate speech because 共匪 is not an immutable characteristic. Instead they're censoring US citizens on a US property to appease a foreign authoritarian nation which would never let its own people have such freedom.
That's an interesting theory. But I don't think it holds up under deeper analysis. Specifically, there are lots of other phrases, including some that praise the CCP directly that are also removed.
Given this additional context, it seems much more likely that the real answer is something like "a bunch of spambots posted messages about communism in Chinese, and as a spam-prevention measure, certain strings were added to a list of auto-removed strings."