When I was a young fundamentalist Christian, I genuinely thought there was something evil in Megadeth's KIMB of all things. I didn't even read the dumb lyrics, just the wiry thin production with those really up-front drum fills and loud bass gave it this menacing tribal mood to me, the snarled vocals, and the high level of intensity was extremely empowering/possessing in a way other music didn't make me feel, and actually gave me a sense of guilt. Other thrash albums in my early metal development, such as Bonded By Blood, made me feel similarly. By the time I got into death and first-wave black metal, music no longer felt scary or evil to me. The forbidden fruit effect I guess.