I guess I just have to wonder why are there "warnings" associated with the "magic"? I mean if it's an idea that your mind has the power to will things outside of your body then sorry that's mumbo jumbo to me.
You
believe it is all "mumbo jumbo".
I would suggest that you do not
know this to be true.
Satanism asks you to stop believing things long enough to find out what is actually true.
Most people simply believe what they are told and look to authority figures to pronounce what is real.
We don't.
Additionally you are truly beating a dead horse here as you can be a happily practicing Satanist and
never perform any acts of ritual magic.
So you do not even have to challenge your
belief that magic is "mumbo jumbo" to be a Satanist.
But you will not get very far disputing others who
have taken the trouble to challenge their own former beliefs and have drawn different conclusions.