The "dogma" is all part of Satanism. It isn't Satanism without it - hence the name! I cannot tell you how many times I've heard people ask why Satanism isn't called something less offensive, like "Humanism" or something. It's not called "Humanism" for a reason!
Plus, if you discount the effectiveness of magic then you'll never be able to successfully employ it, and I can tell you from experience, that's not something I would want!