I don't think you are clear on the ideology behind Satanism. It has little to do with worshiping the Devil as such. Come on, I am sure every religion depicts Devil as the loser in the battle of Good vs Evil. Why would somebody want to be on the losing side??
Satanists do not really believe in the divine. They believe that the purpose of life is to seek satisfaction and happiness for oneself. The Satan they worship is only a figurative anti-God. They do not expect Satan to save them from their misery and such. The Satanism and occultism portrayed by musicians and media is done for the shock value and to make money. Obviously, nobody believes deep inside that they are evil :D
-- My current rig
Guitar: '98 MIJ Ibanez RG520 QS w EMG 81/60
Amp: Laney LC15R Tube, Fernandes 20W SS
Pedals: MI Audio Tube Zone Overdrive, Boss OD3, CS3, MT2, HM2, DS2, CE5, DD7, TU3, Beta Aivin DD2 Delay, Dunlop Crybaby 95Q, Stranger Vol Pedal, BBE SupaCharger
Others: Yamaha RBX 374 Bass, Yamaha MM-6 Synth, M-Audio Fast Track, Shure SM-57, Heet Sound E-Bow Plus
Wanted(pm if selling): EB VPJr/Boss FV500L,Ibanez w Original/Lo-Pro Edge