Matthew 16:18, Jesus established a Church Upon Peter, in John 20:23, Jesus breathed on the Apostles, and said, As the Father has send me, so I send you." How did the Father send Jesus? He send Jesus with Authority, likewise, Jesus, send the Apostles authority over men to bind and lose and forgive sins. This was handed down to their sucessors the bishops.
The Magisterium is founded in Scripture, the Council of Jerusalem is the first one. The Magisterium is the authority of the bishops in union with the Pope. Just like the first Council, the Apostles resolve the issue of circumcision and with the inspiration of the Holy Spirit, they decided that Gentile don’t have to be circumcised and that they have to abstain from meats offer to idols.
- The belief that Mary is a co-redemptrix with Christ.
This is the belief but not mandatory. No Pope has proclaimed it to be infallible. Even though, many Catholics believe in it. Co-Redemptrix does not make Mary equal to the Jesus. It only state that she parttake in the Salvation History but accepting the Father’s will to bring forth the Word of God into flesh by her FIAT.
- The unwillingness of the RC to acknowledge that God is wholly in other churches besides the RC.
Wow what igorant remark. Have you not read what the Catechism of the Catholic Church states regarding those Christians not in commonion with Rome?
Let this enlighten your ignorant mind.
817 In fact, "in this one and only Church of God from its very beginnings there arose certain rifts, which the Apostle strongly censures as damnable. But in subsequent centuries much more serious dissensions appeared and large communities became separated from full communion with the Catholic Church - for which, often enough, men of both sides were to blame."269 The ruptures that wound the unity of Christ’s Body - here we must distinguish heresy, apostasy, and schism270 - do not occur without human sin:
Where there are sins, there are also divisions, schisms, heresies, and disputes. Where there is virtue, however, there also are harmony and unity, from which arise the one heart and one soul of all believers.271
818 "However, one cannot charge with the sin of the separation those who at present are born into these communities [that resulted from such separation] and in them are brought up in the faith of Christ, and the Catholic Church accepts them with respect and affection as brothers . . . . All who have been justified by faith in Baptism are incorporated into Christ; they therefore have a right to be called Christians, and with good reason are accepted as brothers in the Lord by the children of the Catholic Church."272
820 "Christ bestowed unity on his Church from the beginning. This unity, we believe, subsists in the Catholic Church as something she can never lose, and we hope that it will continue to increase until the end of time."277 Christ always gives his Church the gift of unity, but the Church must always pray and work to maintain, reinforce, and perfect the unity that Christ wills for her. This is why Jesus himself prayed at the hour of his Passion, and does not cease praying to his Father, for the unity of his disciples: "That they may all be one. As you, Father, are in me and I am in you, may they also be one in us, . . . so that the world may know that you have sent me."278 The desire to recover the unity of all Christians is a gift of Christ and a call of the Holy Spirit.279
Your statement of assumptions is completely igorant of Church teachings.