I think they are trying to make Fabians a thing IYSWIM (I know the Fabian society is real, but I think they want it to be the next big insult).
It's keeps popping up on social media but never in real life. What usually happens is that bots will start referencing a phrase/an idea and if it gets a foothold (ie it turns out that it fits with a genuine grievance some people have) double down. I don't think it's possible to use social media etc to make new grievances/divisions. The trick is to test and test till you find a crack then expand that crack. And it's now possible to do that quickly at scale.
I don't think everyone that I disagree with online is a bot. But there are patterns that are quite recognisable (like those comments about finances that are always pushing ac--- scammer) and there are a lot of bots of Facebook and twitter. No idea if your guy was genuine or not. But it doesn't feel as successful to me as two tier Kier or the New World Order stuff.