Because the stuff today isn't metal... It is decended from metal.

Look at it this way. I have Sicilian blood. But I wasn't born in Sicily. I am decended from Sicilians, but I am not a Sicilian. From Sicily.

Nu-Metal is much the same. Decended from metal, but metal it is not. The moment you have to catagorise it, it is no longer metal. Stuff now is a completely different beast. Some good, some bad, but the moment somebody calls it death metal, or grind metal, or speed metal, it is no longer metal. It is a Sicilian American. Or something to that effect. However, adding a title to it automatically makes it self mockery and parody. (See Spinal Tap) Metal was hardcore. Parody or self mockery is something you point your finger at and laugh. People seem to forget that metal died, so the joke really is on them.

You can't dust for vomit.