there were at most a couple of hundred people on the streets of Sunderland, it's a really small number of people with a voice louder than there size should allow.
There are a few far right irish folk but in Northern Ireland the vast majority of "nationalists" such was the shinners etc are on the left.
i'd take what that account says with a pinch of salt
They managed to burn down the citizens advice is Sunderland and in their mad attempts to pretend it wasn't a citizens advice managed post a picture of the building with the citizens advice sign clearly on the door