[size=3][font=Times New Roman]If Protestants are already a part of the Catholic Church as Vatican II teaches. Then there is no need to convert.
[/size] [/font]Your first sentence is an oversimplification, resulting in an erroneous conclusion. Jesus prayed that “they may be one”. Either we, as Catholics, are one, or the Father did not answer Jesus’ prayer. **(Rom. 12:5, 1 Cor. 10:17, 12:13, CCC 813–822) **
Catholicism also teaches that she has the fullness of faith, with the evidence thereof. She bears the four marks of God: One, Holy, Catholic or universal, and Apostolic. That should be reason enough to convert.
[size=3][font=Times New Roman]I am still confused because accroding to Fr. Michael Muller C.SS.R. he taught in his book The Catholic Dogma, that invicible ignorance will not save Protestants and non-Catholics.
[/size] [/font] I believe you are misreading what he is saying because you are taking it out of its historical context. The Catholic Church had not yet clarified and further defined “No Salvation Outside the Church” when this book was written, and that is one reason she held a council: to clear things up. Many traditionalists are still upset by the development of the Church. They want to see her remain exclusive and ineffectual. The ones who whine about the Church’s expansion (not changing) of this doctrine also whine about the Novus Ordo Mass, and the legitimacy of Vatican II. Stay away from these rebels! The dissent they sow bears the fruit of involuntary doubt, which can lead to a loss of faith, leading to a violation of the 1st Commandment!
[size=3][font=Times New Roman]Also, the Congregation for the Faith (see: Catholic Replies) Drummey says (pp 99-100) that a strict interpetation to:
Extra Ecclesiam Nulla Salus
Can be held as also a liberal one too! Which is it?
Protestants are saved?
Protestants are human beings!
I am confused
Ultra-traditionalist literature like the book you are reading has confused many Catholics. Protestants can be saved, and the Church is a lot bigger than what these rad-trads want us to believe. That means the Church is not confined to the Church on earth. No one goes to the Father but by Jesus, and who are we to tell Him how to do His job! He tells us through the Magisterium, and it’s been that way from the beginning!
One more thing, bobby. Catholics can disagree on something, and theologians can question any doctrine, within very large parameters. Then the Church considers everything, and seeks the truth on the matter, then the Pope writes an encyclical. When Protestants disagree on something, they divide. We develop, Protestants divide. That’s why our teachings seem so complex. 2000 years of development. That’s another reason to convert. Here is a good link that will clarify things about all this “No Salvation Outside the Church” stuff.
150 Reasons Why I am a Catholic