They are mentally challenged/weak of thinking yobs. They're cannon fodder.
The real nasty pieces of work are the ones sitting in the background, begging for money from their supporters, inciting hatred, editing videos and photos and allegedly keeping their hands clean. If they are questioned for incitement to hatred, they play the victim card by expressing faux outrage, so their supporters are even more convinced that the establishment, including the police, is out to get them.
Stories about the dead horse and man with slashed throat are still circulating on social media. In fact, the man who allegedly slashed somebody's throat has been named. I hope he's being protected.
It's long been known that various right wing groups in the UK have links, some with established political parties. Saturday's violence was deliberate and orchestrated. There is absolutely no equivalence with BLM protests.
This is exactly what happened in 1930s Germany. I don't know how many times I've read that the whole of Germany was to blame because nobody did anything to stop it. Anybody who thinks that Saturday's "culture" (ho ho) protests were in any way justified is just the same as those Germans who did nothing.