Re: wtf
I've had similar experiences, except I've had people tell me anything that doesn't have harsh vocals isn't metal. Ludicrous. In your case, some people won't accept evolution (for people who only like trad. heavy metal), or they're just downright, well, stolid.
MegaMetal can "educate" her all she wants, but if she doesn't want to listen, it's a lost cause. He should just let it go and move on. No point in fretting over this. It's all music regardless of how you classify it (or don't for that matter).