Yes all of the above really. It’s messy. Working class loyalists feel cornered and ignored and are lashing out. DUP have massively own-goaled supporting a hard brexit, hoodwinked by Boris. The ramifications of brexit and border issues are unfolding and confusing, and they fear unification on the cards in the near future, slowly starting to see the rest of the UK barely even knows they exist.
They can’t budge an inch, obstinance and antagonism is their culture, and they're entitled. Any perceived or actual loss of power or wealth is always ‘them’uns’ - catholics / sinn fein, a brutally simple view of the world that’s manipulated by the DUP.
Also, these problems are real and cause people genuine pain etc but in terms of spilling into riots and violence lockdown, boredom is partly a factor, it’s a bit of craic. Watch the videos and you see kids enjoying themselves while adults jeer and encourage.
The ‘community groups’ organising on social media obviously are usually paramilitary led or at least affiliated, and those people still run plenty of things in these areas, drugs included. UDA etc. They’re pulling the strings to whip up attention and controversy while out of school kids and unemployed teenagers get a bit of excitement. Pretty grim, and will get more serious if someone gets killed