It concerns me that what Pen describes as extreme nationalism is becoming normalised. Whilst the behaviour is certainly extreme, I'm not so sure that the attitudes can still be described as extreme.
I do agree with both of you that they probably don't have a clue about the theories behind Brexit.
I don't even know that this was an organised gang. I guess the police will try to establish that and what motivated them.
PS. I know this is slightly off-topic, but yesterday I saw one of the sickest Tweets I've I've ever come across.The former EDL leader, Tommy Robinson, posted some pictures of the aftermath of the latest Stockholm attack with squashed bodies and body parts on the road. In a way, that's no worse than pictures of the dead children in Syria, but the comments he posted with the photos were quite clearly intended to be inflamatory and a "call to arms".