Individual men, priests, bishops, popes can sin and be in error. Some have been excommunicated from the Church for their errors or heresies.
The Catholic Church as an organization is protected from errors in teaching God's Word.
The Magisterium is the Church’s teaching office established by Jesus Christ to “guard what has been entrusted” (1 Tim. 6:20). The Magisterium, in service to the Word of God, authentically interprets the Word, whether in Scripture or in the form of Tradition. The Magisterium is exercised by the Pope and the bishops in union with him. Because Christ has instituted the Magisterium to communicate His saving truth, the faithful should respond in docility and joy to the Church’s teaching out of love for Christ.
Infallibility is a charism whereby the Holy Spirit protects the Magisterium from teaching error on matters of faith and morals. The Church exercises this charism when she teaches definitively, whether in a solemn manner (i.e., through the extraordinary Magisterium) or through the ordinary and universal Magisterium.
The Holy Spirit teaches the Church “all things,” bringing to mind everything that Christ first taught His apostles (cf. Jn. 14:26). That is why Jesus can say, regarding His apostles and their bishop successors, “He who receives you receives me” (Mt. 10:40). Chosen by Christ, they exercise the Church’s Magisterium or teaching office. Christ sends His apostles and their successors as the Father sent Him—with “all authority in heaven and on earth” (Mt. 28:18).
Jesus declared that the gates of hell would never prevail against His Church (cf. Mt. 16:18-19). This protection from evil includes protecting the Magisterium from teaching error. Regardless of who the Pope and bishops in union with him may be at a particular time in Church history, the faithful have Christ’s Word that the Holy Spirit will guide His Magisterium in preserving and teaching the truth.
Your post 158 is one of the most tortured attempts at logic I’ve seen in a while. So much circular and contradictory talk.
The Catholic Church as an organization is protected from errors in teaching God's Word.
And yet the angel did NOT refer to 'individuals', but to CHURCHES.
Try to wave it away a wee bit better...
Others get to be pope and CONTINUE their sins...
Why is your PRESENT pope upsetting SO many of your FR brethren?