heavy metal aint loud and angry...
listen to Wordup by KoRn
Circle by slipknot?
heck, listen to vermillion, before I forget, Pulse of the maggots...
None of those songs are angry.
Before I forget is about staying true to yourself, vermillion some girl, and pulse of the maggots they are saying they will stand up for their fans...
It's like saying rap is only about sex and drugs and killing...
nevermind, thats all rap IS about, lol.