@ Zach216: No, I'm not stupid, just stating the obvious. All metal bands, yes, but as Zetsubou clearly pointed out, DM is melodic death metal, Killswitch Engage is metalcore, and Trivium is metal. Sub-genres was what I meant by the way. No need to jump all over me for that.
@Metal4ever88 Entirely different genres... are you stupid? No they both are in some genre of metal, sub-genre's you can debate but heavy music either kicks ass or it comes off as phony and contrived. DM rules