Earlier quoted context omitted.
Certainly people on both sides were accused of that but the idea that Black Lives Matter was actually just a Russian plot is frankly pretty repellent, and that paper in the end just defers to Twitter's ideas of who's a Russian troll, and how did they decide? We've seen a lot of really shoddy work in this department.
No, I’m not saying it was a Russian plot at all. It’s a real thing. I’m saying they seized on it as something they could use to push division between people.
https://blog.plan99.net/did-russian-bots-impact-brexit-ad66f...
These studies are seeing patterns in noise. That's why the narrative changed over time - it used to be "Russian twitter bots got Trump elected!" and now it's "they're supporting both sides .... to sow division!".
The former claim was extremely implausible but at least it had some sort of inner logic to it, in that Trump was more friendly to Russia than Clinton. The new spin doesn't even make logical sense. However it makes perfect sense if you're just picking random Twitter users and trying to explain their behaviour through the prism of some convoluted conspiracy.