In case anyone has been led into the error of believing that the Old Covenant is still valid for the Jews, as the USCCB Adult Catechism explicitly taught, I wil provide a few quotes showing what the Church actually teaches.
Council of Florence: It [the Catholic Church] firmly believes, professes, and teaches that the matter pertaining to the law of the Old Testament, of the Mosaic law, which are divided into ceremonies, sacred rites, sacrifices, and sacraments, because they were established to signify something in the future, although they were suited to the divine worship at that time, after our Lord’s coming had been signified by them, ceased, and the sacraments of the New Testament began; and that whoever, even after the passion, placed hope in these matters of the law and submitted himself to them as necessary for salvation, as if faith in Christ could not save without them, sinned mortally. Yet it does not deny that after the passion of Christ up to the promulgation of the Gospel they could have been observed until they were believed to be in no way necessary for salvation; but after the promulgation of the Gospel it asserts that they cannot be observed without the loss of eternal salvation. All, therefore, who after that time observe circumcision and the Sabbath and the other requirements of the law, it declares alien to the Christian faith and not in the least fit to participate in eternal salvation, unless someday they recover from these errors".
Pope Pius XII taught the same in Mystici Corporis Christi:
Pope Pius XII:** "And first of all, by the death of our Redeemer, the New Testament took the place of the Old Law which had been abolished;** then the Law of Christ together with its mysteries, enactments, institutions, and sacred rites was ratified for the whole world in the blood of Jesus Christ. For, while our Divine Savior was preaching in a restricted area – He was not sent but to the sheep that were lost of the house of Israel -the Law and the Gospel were together in force; but on the gibbet of his death Jesus made void the Law with its decrees, fastened the handwriting of the Old Testament to the Cross, establishing the New Testament in His blood shed for the whole human race. “To such an extent, then,” says St. Leo the Great, speaking of the Cross of our Lord, “was there effected a transfer from the Law to the Gospel, from the Synagogue to the Church, from many sacrifices to one Victim, that, as our Lord expired, that mystical veil which shut off the innermost part of the temple and its sacred secret was rent violently from top to bottom.” (Mystici Corporis, #29).
Let us hold fast to what the Church has always taught and turn a deaf ear to anyone who teaches the contrary, keeping in mind that during the Arian crisis it is said that between 97% and 99% of the Bishops were Aian heretics. What percent of Bishops today believe that the Old Covenant “has never been revoked by God” and is still salvific for the Jews? God only knows, but it may be as high as those who denied the Divinity of Jesus during the Arian crisis.
St. Vincent of Lerins: "What then will the Catholic Christian do, if a small part of the Church has cut itself off from the communion of the universal Faith? The answer is sure. He will prefer the healthiness of the whole body to the morbid and corrupt limb. But what if some novel contagion try to infect the whole Church, and not merely a tiny part of it? Then he will take care to cleave to antiquity 9Tradition), which cannot now be led astray by any deceit of novelty.