Yeah exactly that's why I told you it's not good to reveal that you're a Satanist yourself or not tell them about Spiritual Satanism. Actually they might get angry and attack you or persecute you or something if they hear the word Satan. Or try to convert you back to pisslam. Only tell them if you are 100% sure that the are open minded enough to listen. The word "Satan" almost always raises an alarm in people of enemy religions and they will always react negatively when they hear that, even if they don't show it in front of you. For example they may "pray" for you (which is a psychic attack) even if they seem outwardly to accept you as you are.
As I said before, if you want to spread the truth to people it's best to spread it using anonymous means. Leaving pieces of paper with the jos or exposing christianity site, or going into online forums and enlightening people there (though make sure you use tor before you do that so they can't see your real IP and IP ban you or something) and many other ways like that.
These are all for your own safety.