According to the teaching of the Bible there is only one way of salvation, which can obtained by faith in the Lord Jesus. The Lord Jesus is the only Mediator, Saviour and way of salvation to God. This means that we can't keep beside Jesus no other ways of salvation and if someone do like this he is not in saving faith, because saving faith works only by faith in the Lord Jesus.
If we don't understand what the Bible teaches about the salvation, so we can be deceived to think that the Catholic Church is the Church of God, although it is not. We can't despise the way of salvation. A believer can err doctrinally and still is in saving faith, unless doctrinal error do not place beside Jesus other ways of salvation. What comes to the official doctrine of the RCC, so there is no question about doctrinal error, but wrong doctrines with many ways of salvation beside Jesus. RCC has distorted the Biblical salvation.
For this reason RCC is anti-Christian sect, because it distort Biblical way of salvation. If we don't understand this, so we can astray to ecumenical trap that leads straight into bosom of antichrist. RCC sets beside Jesus several ways of salvation as water baptism, Mary as Mediatrix, holy mass and inguldences and so on. Because RCC has many ways of salvation. so it means that a Catholic who believes the whole doctrine, in other words RCC's official teachings can't be in saving faith. RCC teaches that every Catholic must believe all the teachings of the RCC and according to RCC a Catholic can't be a Catholic if he don't believe the whole doctrine of the RCC.
A catholic must believe all the teachings of RCC that he can be a Catholic. If inside of RCC is a person who sets the salvation alone by faith in the Lord Jesus, so he is in saving faith, but he can't be anymore a Catholic, because if he would want to be a Catholic he must set beside Jesus all Catholic ways of salvation. RCC doesn't recognize such person as Catholic who don't believe in all official teachings of RCC including many ways of salvation. If you are inside of RCC and believe that Jesus is only way of salvation, so escape and leave RCC and pray that God lead in the Church that walsk in the truth byt he power of the Holy Spirit and loves God.
Do not to think erroneously that I place myself in the place of a judge or that I'm condemning Catholics to eternal damnation, that I'm not doing, but I bring out the truth of the Bible. According to the Word of the Bible a Catholic can't be in saving faith if he believes in all teachings of the RCC. I pray in my heart that many Catholics will find the salvation alone by faith in the Lord Jesus.