There’s a pretty good excuse. He was told a piece of information by a source

Oh, "a source" gave him information that was completely incongruous with any observation made by people on the ground? It sure seems like using "a source" to launder absolute bullshit would be effective if it can merely be brushed off after the fact, so it's a good thing western rags don't do that constantly.

I brought that specific one up because I found it first, but walked it back when I found out it was unreliable

That's the lovely thing about anglosphere propaganda, you don't need to censor the truth (well, mostly) so long as you make your version of a story a thousand times more accessible than the other versions of that story.

But more broadly, I’m looking at hundreds of citizens being killed by their own government.

Remember the death total there includes soldiers, and we are talking about militants who killed unarmed soldiers clashing with the PLA, with students being deliberately driven into the crossfire by student leaders.

In the US, the closest to that was race riots against Black people that ended a hundred years ago.

If we mean "against their own citizens" then, uh, sure, I acknowledge that the types of conflict the US is involved in is very different from what China does. China fights off color revolutionaries domestically while the US kills millions abroad, an unknowable number of migrants, and is in a constant process of lynching black people and occasionally protestors to those lynchings.

We’re not censoring discussion of them

Are you kidding? There've been ongoing efforts for the country's history to censor discussions even just of chattel slavery in schools, to say nothing about how talking about the summary executions otherwise referred to as "officer-involved shootings" are basically considered satanic CRT material and any attempt to call the no-note-"suicide"-by-hanging of BLM organizers a lynching when the cops say otherwise makes you a conspiracy theorist.

Can you imagine if this happened just once in China? An ethnic minority pretty much ritually murdered in the form of historic violence against that ethnicity, written off as "suicide" and brushed under the rug with no further contest, despite of protests from the victims' parents that the thesis makes no sense.

and there are efforts to reconcile with the nation’s past

The current head of state, the leader of the so-called left wing party, is an unrepentant segregationist who justified his actions with a "states' rights" argument as recently as, like, 2019 (and he just hasn't been challenged on it since). Do you think the dashiki stunt helped us towards reconciliation? There is no effort to "reconcile" with shit. There's an allowance for more black drone pilots, but reparations or even just basic restitution for the destruction and theft wrought on black communities is a pipe dream.

China teaches about the June 4th incident in its schools, it's a matter of public knowledge, and claims to the contrary are made by ignorant redditors who read 1984 and just kind of imagine what China's domestic policy is based on vibes.