Most of those bands are bullshit metal rip-off hardcore bands so shut the fuck up. Listen to Stigmata ( anything before Do Unto Others, because do unto others that sucks donkey dick ), Merauder, Kickback, Congress, Deformity ( the Misanthrope demo specially, the later stuff is too death metal inclined, the early stuff is pure deathcore. ) THOSE are fucking metalcore bands, the bands you mention not only all suck but have no fucking idea of what a true fussion of genres really means.
Sincerely: Fuck off, you where never a hardcore kid, you are just a metalhead dude that knows a few trendy bands.