Where does it say NSBM is one of fearest musical genres?
Doesn't it say that "towards end of 90's black metal - by then one of the most feared...". And that could be seen as fact. How many music genres create media hysteria for example? In the 90's, at least in Finland, there was quite steady news reports of satanism as well as all sorts of educators writing books or talking of dangers of BM and satanic underground etc. Reports of arsons, murders, all sorts of things. Only other music style I can think of, would be "gangsta rap", but that being so distant issue overseas, it would be hardly relevant here.
How much "fear" would music genre create - possibly very little, but out of all genres there are, some are probably causing more fear or simply repulsion.
Nowadays, it's hard to say what other music genres get so often banned from live gigs or face such opposition? As much as I understand people would say NSBM is such a joke and nobody takes it seriously and nobody knows or cares, it STILL today remains as thing that makes into newspapers, gets activists alert and even bring opposing forces in streets once in a while. It doesn't happen because someone thinks "oh, this is so funny and cute, lets try to sabotage the planned live show". There is - if not fear - then genuine worry for certain aspects.
There are couple academic black metal studies going on in Finland. One is just about to get into moment of debate and if accepted, it will create of more guy with "doctor of philosophy" -position. Swedish language work, 200 pages, translated the name is something like WARRIORS AND TRANSEXUALS. It's studies gender roles and such among Finnish black metal, based on study of heteronormative things, via various queer theories. Pretty amazing conclusions. There is free PDF in swedish if someone is interested... haha..
Another is "NSBM" study, already been work for many years. Not sure when it's supposed to be ready.