You are under NO obligation to explain anything to anyone. Your beliefs are your own and private if you so desire. Please remember that the sheeple are monkey minded, do you really think they will accept your news that you are a Satanist in a decent fasion? No, they will do the xtian thing, they will attack and persecute you. They will backstab you. Secrecy is ok and secrecy is how we have survived for many years. Only a fool fights a battle he cannot win. The barging into your room will only increase if you tell your parents that you are a Satanist. The school may label you mentally ill. The fact that xtians have a bloody history of rape, delusion, murder and torture will not matter. My advice is to remain secret untill you are out on your own and have your own place. Never assume that xtians are as open minded and accepting as Satanists are. xtians are dangerous and have a history of PROVEN violence and manipulation. Don't put yourself in danger.