No they are not satanic. I wondered the same thing but they are not. I know where you may be getting that from, yes Dethklok does use pentagrams and has been to the church of satan, but no they are not satanic if you go to dethklok.org, it will not tell you that but it will give you some facts about dethklok. But no they are not satanic and they don`t worship Satan.