So to be clear:
1) Golding goes round to somebody's house to "out" him as a terrorist
2) However this person had already been "outed" in the media and the authorities are well aware of this, so it's unclear what Golding was hoping to achieve by going round to this person's house dressed in his "uniform"
3) But what he did manage to achieve was getting himself arrested and charged for harassing a woman in her own home
I think this tells us something about his character. He is unwilling to let British justice take its course, and instead seeks to dish out his own vigilante justice. Can he really be surprised when he's arrested?
You only have to Google Britain First to discover many well-researched and well argued cases against them, for example this very recent one in The Telegraph:
http://www.telegraph.co.uk/history/world-war-one/11207973/The-loathsome-Britain-First-are-trying-to-hijack-the-poppy-dont-let-them.html
As for how many of the 500,000 Faecbook fans wouldn't follow "the BF" if they realised what they were really all about ... Among my own friends and family, every single one that has posted a piece of Britain First propaganda has removed it and stopped following them after I've pointed out articles like these that describe what Britain First is really all about:
http://www.liverpoolecho.co.uk/news/news-opinion/jade-wright-says-think-twice-7230185
http://anotherangryvoice.blogspot.co.uk/2014/06/12-things-britain-first.html
So, in my experience, 100% of people in my circles have been duped into supporting something they did not mean to support.
One of the worst things that Britain First has done is to use Lee Rigby's name without permission and caused great upset to the Rigby family in so doing. Apologists say this was an error (one of many!), but they continue to do it - two recent examples being posts about the deaths of Rik Mayall and Lynda Bellingham, neither of whom would ever have supported Britain First when alive ...