Well yeah, i appreciate when someone who i try to get into metal says: "Hey man, this is too brutal/aggresive/whatever to me, but its cool how good they are at playing their instruments, just look how awesomely he is moving fingers on fretboard" Or something, but i hate people who say "OMG THIS IS BUNCH OF NOISE, my dubstep is better bcoz my older sister listens to it and im so cool becouse im listening to dubstep and Justin Bieber is so sweet omg omg omg"
And about screaming/growling, i also dont like it, but only when words are undecipherable. Like just someone is growling/screaming random letter, and not even trying to growl/scream the word.
And more to op's post, i also hate people who dont know a fucking thing about anything, think Las Vegas is in Poland, think London is country and think printing more money would solve problem of poor people.
And the music tidbit? Why the fuck would I listen to music that just hurts my ears. I don't get that. Do you people listen to music that you find unpleasant? That's the same thing as forcing someone to watch a shock site. I HATE death metal and you know what? I don't care how much talent it takes to scream, if it hurts my ears and makes me wince I am not going to listen to it anymore.
/endrant
Death metal is not for everyone, but some people still like it and it hurts their feelings when you say "omg this is shit it hurts my ears and this sucks ill go to my dubstep and you are *insert insult here* for listening to this crap", i would more like to hear polite thing like "Well this music is not for me, sorry, but if you like it its fine, everyone has different tastes"