Why did the Catholic Church change so radically after Vatican II in regards to the status of Jews?

Before Vatican II in the 1960s, the Church was overtly anti-Jewish. For example: - St. Thomas Aquinas writes in *De Regimine Judaeorum* (also called *Epistola ad ducissam Brabantiae* ) that "the Jews by reason of their fault are sentenced to perpetual servitude". - The Church had the Good Friday prayer that addressed "the perfidious Jews." That prayer is no longer said by most Catholics. - The Church sanctioned the expelling of Jews from many nations. - The Church in some places made the Jews wear special symbols so that they could be distinguished from gentiles. - In the 17-19th centuries you had a series of popes (e.g., Pope Leo XIII in his encyclical *Humanum Genus* ) condemning the rising influence of "Judeo-Masonry." - Pope St. Pius X had a conversation with Zionist founder Theodore Herzl and told him that he can't recognize the proposed state of Israel until the Jews recognize the Church and convert. - etc. This overtly anti-Jewish attitude of the Church that existed for 1960-odd years just seemed to vanish after Vatican II, and was replaced with a positive view of the Jews. I've even heard senior Churchman refer to Talmudic Jews as elder brothers of Catholics. This about-face on the subject of Jews is just one of many radical changes that occurred to the Church in the wake of Vatican II. If the full deposit of the faith was revealed by Jesus, then how can the Church teach contradiction? How can the Church teach one thing about the Jews for nearly two millenia, and now practically fawn over them?