Why would this surprise you? For the audience's sake, please quote the sections that are relevant and the dates the bulls were promulgated. Then we can wrap this thing up.
Wrap it up? Do you really want to open up that can of worms? Most Catholics, including the clergy, want to bury those Papal Bulls back in the Middle Ages and never let them see the day of light again. But since you insist....................
Unam Sanctam from Pope Boniface VIII, dated 1302 - 'We are compelled, our faith urging us, to believe and to hold - and we do firmly believe and simply confess - that there is one Holy Catholic and Apostolic Church, outside of which there is neither salvation nor remission of sins; her Spouse proclaiming it in the Canticles, "My dove, my undefiled is but one, she is the choice one of her that bore her"; which represents one mystical body, of which body the head is Christ, but of Christ, God.
If, then, the Greeks or others say that they are not committed to the care of Peter and his successors, they necessarily confess that they are not of the sheep of Christ; for the Lord says in John, that there is one fold, one shepherd, and one only. This authority, moreover, even though it is given to man and exercised through man, is not human but rather divine, being given by divine lips to Peter and founded on a rock for him and his successors through Christ Himself whom he has confessed; the Lord Himself saying so to Peter: "Whatsoever thou shalt bind", etc. Whoever, therefore, resists this power thus ordained by God, resists the ordination of God, unless he makes himself believe like the Manichean, that there are two beginnings. This we consider false and heretical, since by the testimony of Moses, not "in the beginnings", but "in the beginning" God created the heavens and the earth.
Indeed we declare, say, pronounce and define that it is absolutely necessary to salvation for every human creature to be subject to the Roman Pontiff.'
(note - the reference to the Greeks clearly refers to the Eastern Orthodox Church. This cannot be denied. The reference to others refers to the Waldensians, the Oriental Orthdoox and any other Christian group not in union with Rome.)
Now as powerful as Unam Sanctam is, it pales in comparison to Cantate Domino, signed by Pope Eugene IV in 1441 - 'The most Holy Roman Church firmly believes, professes and preaches
that none of those existing outside the Catholic Church, not only pagans, but also Jews and heretics and schismatics, can have a share in eternal life; but that they will go into the eternal fire which was prepared for the devil and his angels,
unless before death they are joined with Her; and that so important is the unity of this ecclesiastical body that only those remaining within this unity can profit by the sacraments of the Church unto salvation, and they alone can receive an eternal recompense for their fasts, their almsgivings, their other works of Christian piety and the duties of a Christian soldier.
No one, let his almsgiving be as great as it may, no one, even if he pour out his blood for Name of Christ, can be saved, unless he remain within the bosom and unity of the Catholic Church.'
(note - the reference to schismatics refers to the Eastern Orthodox and the reference to heretics refers to the Waldensians, the Czech Reformers and the Oriental Orthodox, unless you care to throw the Oriental Orthodox into the schismatic category. Also the heretic term would apply in the next century, the 1500's, to Lutherans and Anglicans and obviously later on to all future Protestants. The bold print sections are mine, used for emphasis.)
Here is something to bear in mind. The Waldensians began about 1173 and that is 268 years before Cantate Domino. Even more pronounced is that the Oriental Orthodox broke away in 451 A.D. or 990 years before Cantate Domino. Now for those who believe that the Vatican II teaching on salvation for non-Catholic Christians via "invincible ignorance" makes sense, since Protestants and Eastern Orthodox and Oriental Orthodox have been blinded by centuries of their own tradition, as this is the explanation that has been given by Popes since Vatican II, remember that only 524 years passed from Cantate Domino to Vatican II in 1965, but 990 years passed from the time that the Oriental Orthodox broke away in 451 up to 1441. Hence, what is so special about 524 years of tradition that warrants "invincible ignorance",
when 990 years was NOT sufficient for the Oriental Orthodox to receive the possible "invincible ignorance" exception in 1441, was Cantate Domino was proclaimed? If my math is correct, 990 years is about double that 524 years amounts to. I am not looking at the 1054 split for the Eastern Orthodox, as their were two brief reconciliations between 1054 and 1441, the date of Cantate Domino, said reconciliation dates being in 1272 at the 2nd Council of Lyon and in 1439 at the Council of Florence. Obviously, Cantate Domino was a response to the Eastern Orthodox faithful rejecting the union that their bishops agreed to in 1439, except for St. Mark of Ephesus it should be noted, who refused to go along.
Don't get me wrong. As a Protestant, I am most thankful for Vatican II and how the Catholic church for the first time,
in an authoritative manner, thanks to an Ecumenical Council signed off on by Pope Paul , acknowledged that salvation is possible for non-Catholic Christians and non-Christians. However, after hundreds of hours of personal research, looking at Papal Bulls, catechisms, writings of saints, etc., I simply must agree with the followers of the SSPX and the Sedavacantists,
that the Vatican II document on Ecumenism, which lays out that salvation is possible for non-Catholics, is NOT in accord with the Traditional teaching of Holy Mother Church!