If he is kind of heart, I believe he will come to see the error in this. Many, many good people fancy themselves as satanists these days, because they don't really understand what is at stake. They have been tricked by the watered down version of satanism, that masquerades as an intellectual's philosophy or an artist's statement of fashionable rebellion. I pray that when the truth comes out and it will everyone with an ounce of compassion and goodness will reject any association with that sick, insidious cult of death. It really might take the full shocking truth, however, before these people accept the error of their ways. I'm praying for your brother to realize this sooner than later. At least he's got you. Godspeed.