I have to admit that I personally can't stand metalcore and deathcore and all of those other "core" metal genres. And since I am human, I also can't help judging and disliking people who listen to and enjoy those genres. However, I used to have a really good friend who was a huge fan of deathcore, And I currently have a really good friend who is a fan of nu-metal. (I also have two family members who like metalcore as well.) Even though I hate it, I always end up knowing people who like it. :L I try not to let my first impressions get the better of me since metalcore fans usually end up being good people. Plus, all four of the people I mentioned listen to non-core metal too, so I can't complain.