This is a long article (excerpts from a book apparently) but it’s interesting.
Basically the author, a man with Jewish heritage, makes a fake persona and joins far-right groups. He’s assisted by the group Hope Not Hate.
What do you think of the far-right? One of the interesting points that is made in the article a few times is that some far-right adherents, met by the author, seem to want friendship more than anything else. At least that’s the author’s view.
Here’s a similar article about a person doing this in the US, for comparison:
https://www.propublica.org/article/ap3-oath-keepers-militia-mole
Yes, we’ve known for a very long time that people join gangs due to social alienation and a need for community. It isn’t new info and it doesn’t change the fact that they have adopted violence and terrorism to make up for being lonely