My theory is that a lot of it in Northern Ireland is actually just paramilitaries trying to get what they want. This happened during brexit as well over the sea border. The areas where the rioting happened in Belfast also had big signs saying “THIS AREA NEEDS MORE SOCIAL HOUSING” and suddenly the solution for the riots that the Deputy First Minister comes up with is an agreement for more social housing. Also that random white-owned estate agents being attacked smells fishy to me.