It's a Catholic website, so reflects Catholic teaching. Nostra Aetate does not affirm the "continuing covenant between God and the Jews" because the Jews broke the covenant (Jeremiah 31:31-34). God didn't, and He fulfilled the Old Covenant with the New (Galatians 3:7-29). There is a reason Nostra Aetate refers to Jews as our "elder brothers," and the reason can be found in Biblical typology. Jews can be saved like anyone else: by Jesus Christ. They can be "grafted in" like anyone else (Romans 11:16-21).