It is propaganda becauae they will twist truths and outright lie to make trans people seem sick or confused, they'll tout harmful and ineffective "cures" as real medical science. They do their best to villify the trans community and the treatments they undergo with cherry picked information and blatant falsehoods and claims of grooming to discredit anything they say or do.

Being trans is not a trend, or a sickness, or evil, or whatever they try to say to make it go away. Our rights, existence, and our medical treatment are not up for debate. This is the same as the true facts they once touted about nonwhites to make a racist agenda and it is most certainly propoganda.

Why should “documentaries”—by which I mean videos of a bunch of transphobic bigots spreading outright fabrications meant to incite hatred against trans people—be exempt from a site’s rules on hate speech?

"(derogatory) Biased communication aimed to influence an audience to further an agenda, encourage a particular perception or provoke an emotional response." (https://en.m.wiktionary.org/wiki/propaganda)

Other dictionaries give similar definitions. The Oxford Languages definition, given by Google, which doesn't seem to be linkable, says: "information, especially of a biased or misleading nature, used to promote or publicize a particular political cause or point of view." That's the only one I've seen that does indicate something like the word "misleading", but even there it is only "especially" information of that sort, not always.

Generally, the word "propaganda" indicates an intent, not an inherent property. Although it is a derogatory term, which people are unlikely to use to describe things they agree with, it is certainly possible for completely true and well-sourced works to qualify as propaganda.

The videos in question are neither true, nor well-sourced, but that isn't why they are propaganda. They are propaganda because they are produced with the intent of provoking an emotional response (fear and disgust at trans people), of encouraging a particular perception (that trans people are dangerous and mentally ill), and of furthering an agenda (of taking away human rights from trans people).

None of that speaks to whether it is the right decision by the platforms. I don't think it is, but I also don't think that the videos should be deplatformed simply because they are propaganda. They should be deplatformed because they are hate-speech and because they are dishonest.

Documentaries are often making a point, arguing a stance.

You're talking about bias. A documentary that portrays a lie as the truth, with regard to politics, is propaganda. When watching video evidence of something it would be important to note how it was edited and framed, but even then you can tell when they're bullshitting you versus giving you an honest caption of an event.

I mean is Super Size Me "propaganda" against McDonalds?

No, McDonald's isn't a political organization and propaganda is distinctly political. This isn't presenting an example of bias either as his goal was to shock his audience. I remember this being in theaters and it was all the shock of what McDonald's does to the average, sedentary, white person - basically middle America in the 90's.

"Bad documentary" really isn't covering what propaganda is. It's more than movies and messages and in the case of the right wing of America they're given credence to voices that will never be trusted by the string pullers. YouTube Shitter, Facebook they don't need algorithms to be done with these dumb-dumbs because it's common sense the earth isn't flat. One utterances of that shit should delete them from a platform. To promote those views, as harmless as they seem, only encourages that poison to filter through the rest of the know-nothings who regurgitate this crap.

America smuggled flashdrives of NCIS (the show) into North Korea. They used the show as propaganda.

A lot of left leaning people will call cop shows COPaganda.

Propaganda is a lot less scary when you learn that sesame street is also propaganda. They preach unAmerican things like "be nice" and "care for others".

When people talk about propaganda they generally mean lying to an audience to motivate people for political power.

I think you're focusing too much on the "propaganda" part and not the "hate speech" part.

Wasn't this the argument for Citizens United?