I have a lot of (sadly misguided) friends who think that NMA are "a bit much", because they actually care about stuff and make no bones about expressing it.
Basically, I don't give two figs what they think.
It did, however, highlight that there is a lot of derision, or even hatred, for NMA and their supporters. Not necessarily from people I know, but this linked thread is real proof of that.
I don't know if they attract more hatred than other bands, but it's definitely there. I guess, like anything that actually means something more than generic trash, there's always going to be people who strongly oppose it.
I'm a bit bemused by the comments about the fans, though. Every NMA gig I've been to, I've found myself right near the front and NEVER had a single issue with aggression or unwelcoming people. Everyone just seems to be there for a great time.