Are you on crack or just plain stupid?
Muslims have never been Christians. Furthermore, many Christians are NOT Catholics. Get a life.
Neither! It is a part of your beliefs. The Catechism of the Catholic Church states the following:
841 The Churches relationship with the Muslims. "The plan of salvation also includes those who acknowledge the Creator, in the first place amongst whom are the Muslims; those profess to hold the faith of Abraham, and together with us they adore the one, merciful God, mankind's judge on the last day,"Of course, the Bible says otherwise. I'll accept your apology now!