I addressed their objections in a way that was satisfactory, so I would suggest you go back a re-read my responses yourself. So far, no one here has successfully or reasonably shown that I am wrong. There's been a lot of subjective assertions that have been made, trying to pass itself off as objective. Sorry, that doesn't cut it.
So to summarize:
You say I'm wrong for encapsulating the meaning of metal by turning to the sounds and styles of the bands that started the genre. You honestly think that's a reasonable claim? If you want to properly define a genre, what better way than to turn the bands that invented it? Again, it really comes off sounding like you're ignorant of the way that metal developed and originated from the beginning.
You say I'm wrong for drawing a distinction between traditional metal and extreme metal, and that I'm wrong for suggesting that this is much the like the distinction drawn between deathcore and death metal. Yet, many fans of death metal will do just this. They will claim that deathcore is not a proper evolution of the genre and isn't true metal. Again, I agree totally with this. This is not a wrong or unreasonable claim whatsoever. Hell, I hate deathcore way worse than death metal. So again, it comes down to where you draw the line. I draw the line between traditional metal and extreme metal, and I think the distinction in musical style is pretty damn clear.
I never claimed harsh vocals aren't a part of metal history. My claim is that they, along with their respective musical styles, are not proper interpretations of true heavy metal, which existed many years before they did. Just as deathcore is not a proper interpretation of death metal. I'm perfected entitled to that opinion, and if you're going to say it's wrong, you need to provide better reasons than what you have.