I totally disagree with this sentence " Its really just a minority out there who are into music like that"
Frankly speaking alot of ppl do listen but not many ppl play or show it out. If you compare our population ratio with other countries, it would roughly be the same. Same as the reason why Singapore is so called "safe" if we were as big as our neighbouring countries, it would never be safe again with whichever government running it.
But back to the topic. I believe and know alot of ppl out there into gore, grind, trash, death metal or whatever but they also listen to other stuffs. Ppl like these normally never show it out as the so called "scene" are always closed-minded. Most of the ppl in the scene believes only in listenning to a particular genre of music and if you don't listen to it or otherwise you are labelled a poser.
The other reason is, it is termed as Satanic music because it influences ppl to take drugs, steal, rape, kill, etc. But I believe that if you are easily influenced to do the stuffs which the song tells you to do, then you are really stupid. We control our mind and body, we have the abillity to listen, like the music but don't follow the bad influences.
Another reason is also, majority of the ppl not only here in SG but ard the world are so used to listenning to pop (commercial) music that it actually brainwashes their hearing. So whatever other music they listen to, they would hate it or diss it. But their population is big enough to actually have a scene of whatever genre of music they produce.