In this topic, there are 2 very distinct issues being thrown into one term, and thus both being condemn and called deviant and all that other BS.
Sadism, delighting in the suffering of someone else, is wrong. Disturbed and twisted. Personally, I am one of those ppl who are fascinated with gore. I frequent certain websites that I can't post links to here. I watch snuff movies, and have downloaded dozens. I watch them, and look at these pictures (typically leaked crime scene photos) because I am fascinated with this type of stuff, not because I delight in their suffering. Actually, I'm rather impartial to their suffering, not feeling one way or the other. Desenitization was one of the goals I had when I started looking at these things.
The other issue, BDSM (Bondage/Domination/Sado-Masochism) is generally a sexual fetish, one which I prescribe to. I enjoy pain. I relish pain. And this is not because I was abused, or raped, or some other tramatic BS. I don't why I like it, but I do.
There is nothing wrong with consensual BDSM. Nothing.