A lot of what happens on Facebook, as with Twitter, is “virtue signalling” – showing off to your friends about how right on you are.and
When purity leftists do actions and organising, their interest is not in reducing oppression as much as it is in reducing their own participation in it. Above all else, they want to be able to say that they are not oppressing, not that oppression has ended.I mentioned this long ago in terms of Not In Our Name, and also suggested that Jonathan Haidt overlooks those places where liberals are just as purity vs. disgust* concerned as conservatives. (See also environmentalism, vegetarianism, NASCAR and a host of other disgust issues, including, I think wealth - though that is more ambiguous in both camps.
The site is useful because it discusses many political issues that are similar in the UK to US discussions but have a completely different cast of characters, and slightly different alignments.
*And authority driven, another trait supposedly more common among conservatives. The imprimatur of Roberth Reich or Paul Krugman is enough in economics; climate change catastrophe is based on choice of authorities.