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."
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."