I get it. I'm not part of that activity, but I get it. They look ridiculous, act insane, and probably are. And the singer is horrible. But, I still get it.
I know how much music moves and means to me. not enough to assault someone, but still. Music has always been part of my family's life, and it's very emotional at times. What kind of music and mood determines what kind of emotions.
Clearly these guys have a lot of anger issues, then add some angry music, and bammm. Regardless of the music or personalities, I get.