The idea of classification of music seems to be an important aspect of this thread. I know followers of Northern Soul who have such a restricted view of what it is, it is a wonder they have any music left to listen to. This is their right. Similarly many other genres; heavy metal, country and western, bluegrass etc. etc. are fiercely protective of what they perceive as their music.
Live and let live is my view. Intolerance is attempting to pressure others into accepting your views.
john