What is nümetal??

http://en.wikipedia.org/wiki/Nu_metal

throughout the past months /weeks there has been lots of heated debate about whether Nümetal is heavy metal or not. it turns out nümetal is in fact NOT a subgenre of heavy metal (see above link) it is in fact a subgenre of rapcore, but has been fused with grunge rock. all of the "Nümetal"bands
http://en.wikipedia.org/wiki/Korn
http://en.wikipedia.org/wiki/Slipknot_%28band%29
http://en.wikipedia.org/wiki/System_of_a_down
http://en.wikipedia.org/wiki/Stone_Sour
are Alternate metal or rapcore http://en.wikipedia.org/wiki/Rapcore
http://en.wikipedia.org/wiki/Alternative_Metal

but Nümtal is not metal and never will i believe it now, but i don't think many of these suit alternative metal either. could it be?