Metalcore is to metal as Vanilla Ice is to gangsta rap.
On a less inflammatory note: I imagine the dislike stems from the fact that some 'proper' metalheads feel protective about their favourite music. It is something like why a 'proper' punk would never be caught dead listening to Green Day; bastardizing your favourite music to make it more widely accepted, and in the process cheapening it, and cheapening other bands with a similar sound by the new mainstream association.
Something like that...?
On a less inflammatory note: I imagine the dislike stems from the fact that some 'proper' metalheads feel protective about their favourite music. It is something like why a 'proper' punk would never be caught dead listening to Green Day; bastardizing your favourite music to make it more widely accepted, and in the process cheapening it, and cheapening other bands with a similar sound by the new mainstream association.
Something like that...?