If you look at the lyrics of some of the early songs they are very angry lyrics, angry at the world, angry at society. They spoke to some people who were similarly angry, but perhaps not in charge of their emotions or their behaviour, particularly when they had a load of beer. late 70s early 80s Britain was a place in quite a lot of turmoil and NMA were not the only band with violent fans (Jesus & Mary Chain to name but one). There was violence at football matches. Just to give a few examples. (and not to condone)
the bands lyrics and the stories they tell have changed over the years. Some of the anger is now sadness (see Modern Times)
Why be territorial about a band? at the risk of sounding like I'm quoting the band to prove a point, look at the lyrics of Family - "Looking for family, looking for tribe" - Justin says it so succinctly I don't need to say more.
I don't care about any so-called hierarchy; to many eyes I'm not a true fan because I don't follow the band from gig to gig - but I'm comfortable with myself and my like of this band and their music. Whisper it, but not all of my politics is always in synch with all feelings posted on here either - but I don't care. I don't need NMA to tell me my politics - but I find their music inspiring, thought provoking, mind-changing, passionate, emotional. And that's what it is all about IMO