I would've thought the same until Microsoft started hiding tank man results in Bing. I'm not so sure if companies will start training different models for every oppressive regime.
Tiananmen Square even shows Tank Man on the first page, 13th and 15th entry, for me. Admittedly, I expected it more quickly on Tiananmen Square; but that might be because I, as a person, forgot that it's also a literal square with more stuff going on at it than a single moment in history.
Repeating right wing rhetoric is corrosive and a red flag that the user is at best repeating it out of ignorance, but likely knows very well what they are doing. We don't go pouring HCL on things we care about, nor do we accept the presence of those who do.
The caption for the image gives a little more insight into "harmful" and one of the things it mentions is factuality - which is interesting, but doesn't reveal a whole lot unless they were to break it out by "type of harmful".
