such a heinous crime, are the cause or occasion of the plague, because through many parts of the world the same plague, by the hidden judgment of God, has afflicted and afflicts the Jews themselves and many other races who have never lived alongside them." He urged clergy to take action to protect Jews and offered them papal protection in the city of Avignon. Jewish "perfidy" A new understanding of the relationship between Catholics and Jews is also reflected in the revised liturgy of Good Friday in a particular way. The pre-1962 version of the Good Friday Prayer of the Roman Rite had Catholics praying that the "perfidis Judaeis" might be converted to "the truth". The English cognate "perfidious" had, over the centuries, gradually acquired the sense of "treacherous". In order to eliminate misunderstanding on this point, Pope Pius XII ordered in 1955 that, in Catholic liturgical books, the Latin word "perfidis" be properly translated "unbelieving", ensuring that the prayer be understood in its original sense: praying for the Jews who remained "unbelieving" concerning the Messiah. Indeed, the same adjective was used in many of the ancient rituals for receiving non-Christian converts into the Catholic Church. Owing to the enduring potential for confusion and misunderstanding because of the divergence of English usage from the original Latin meaning, Pope John XXIII ordered that the Latin adjective "perfidis" be dropped from the Good Friday prayer for the Jews; in 1960 he ordered it removed from all rituals for the reception of converts. As part of the revision of the Roman Missal, the prayer was completely rewritten. The current prayer of the Roman Liturgy for Good Friday prays for "the Jewish people, first to hear the word of God, that they may continue to grow in the love of His name and in faithfulness to His covenant." Jewish deicide In 1962, Pope John XXIII opened the Second Vatican Council, a pastoral ecumenical council of the Catholic Church. It closed under Pope Paul VI in 1965. One of the most revolutionary changes that resulted from interpretations of this council's documents concerned the Church's attitude to Jews and Judaism. Among other things, the Second Vatican Council addressed the charge of Jewish deicide, repudiating the belief in the collective Jewish guilt for the crucifixion of Jesus stating that, even though some Jewish authorities and those who followed them called for Jesus' death, the blame for what