For you to be SO bold to claim that the only Apostolic Church is actually the Roman Catholic Church is more than wrong, it is unbiblical. If God intended only a very specific group to be His, He would have never hardened the heart of the Jew and given the Truth to the Gentiles. You sound more elitist than those of us who subscribe to the doctrine of the elect.
It is biblical. Jesus started a single Church. He gave his Church leaders with his authority to bind and loose and to forgive sins. These leaders appointed successors. We have historical records telling us who these successors were and are. We have historical writings telling us what these successors taught and continue t you teach.
If you reject the Catholic Church, you are rejecting those sent by Jesus.
Pope Clement(4th pope-Letter to the Corinthians round 80 AD)
Chapter 42
The apostles have preached the Gospel to us from the Lord Jesus Christ; Jesus Christ has done so from God. Christ therefore was sent forth by God, and the apostles by Christ. Both these appointments, then, were made in an orderly way, according to the will of God. Having therefore received their orders, and being fully assured by the resurrection of our Lord Jesus Christ, and established in the word of God, with full assurance of the Holy Ghost, they went forth proclaiming that the kingdom of God was at hand. And thus preaching through countries and cities, they appointed the first-fruits of their labours, having first proved them by the Spirit, to be bishops and deacons of those who should afterwards believe.
Ignatius(A Disciple of John)
"Consider how contrary to the mind of God are the heterodox in regard to the grace of God which has come to us. They have no regard for charity, none for the widow, the orphan, the oppressed, none for the man in prison, the hungry or the thirsty. They abstain from the Eucharist and from prayer, because they do not admit that the Eucharist is the flesh of our Savior Jesus Christ, the flesh which suffered for our sins and which the Father, in His graciousness, raised from the dead."
"Letter to the Smyrnaeans", paragraph 6. circa 80-110 A.D.
"This food we call the Eucharist, of which no one is allowed to partake except one who believes that the things we teach are true, and has received the washing for forgiveness of sins and for rebirth, and who lives as Christ handed down to us. For we do not receive these things as common bread or common drink; but as Jesus Christ our Savior being incarnate by God's Word took flesh and blood for our salvation, so also we have been taught that the food consecrated by the Word of prayer which comes from him, from which our flesh and blood are nourished by transformation, is the flesh and blood of that incarnate Jesus."
"First Apology", Ch. 66, inter A.D. 148-155.
Where are the protestant writings from the early Church?