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I actually have driven by a sign for it, yes, when I went through Kentucky, and it’s bizarre. And absolutely there are American oligarchs funding this, that’s why the book Dark Money is so good. Hell, American millionaire William Regnery openly funded Richard Spencer’s National Policy Institute (https://calgary.citynews.ca/2021/07/17/william-regnery-who-funded-right-wing-extremism-dies-at-80/), and John Tanton has created the anti immigrant network the Tanton network (https://www.splcenter.org/resources/extremist-files/john-tanton/). Literally funding racists in the US. The Koch brothers fund a great deal of dark money activity.
And yes, absolutely people will spread health disinformation of their own accord, but it was a deliberate pattern across Livejournal in those days. That’s all I can say. Here is an article from a few years ago about how Russian trolls were so prevalent that Facebook made a tool to identify that you had liked Russian troll content, in which Brooke is quoted. https://www.theguardian.com/technology/2017/dec/22/facebook-tool-russia-troll-army-internet-research-agency
Don’t think this tool exists anymore. But that’s how prevalent it is.
It was so prevalent Facebook actually made a tool to identify it in 2017.
https://www.theguardian.com/technology/2017/dec/22/facebook-tool-russia-troll-army-internet-research-agency