"Pro Tiananmen Square posts get removed off of Chinese social media? No shit. Imagine if the January 6th protestors had strung up and set a bunch of the National Guard on fire and you posted saying they didn't go far enough, most places on the web would remove your posts, except maybe Elon Musk's twitter."
Pros: Any libs wanting to engage would have to either read more about the events leading up to and during the Tiananmen Square protests or admit that January 6th was a nothing event
Cons: none
Yeah I mean it is a case of "Our beautiful removing calls to violence vs Their barbaric political suppression" but at the same time, using January 6th in the bit is how it's possibly a way to break into their head.
Take an event that is such a feature in their brainspace and ask them to imagine if it was so much worse than even their memories of the event. Imagine if the January 6th protestors really HAD been sent support and money by [spins wheel] Russia. Imagine they went around on their jeeps and trucks shooting police and National Guard. Ask them to relate to another group of people and how they might feel about a specific event of political violence in living memory.
It does not matter. They'll just make shit up about how the PLA did this or that, if not just call you an authoritarian 1984 tankie [insert homophobic joke about how much you love Xi here].
Ample experience has taught me that it's completely useless to argue with these people.