The mystery of faith in the salvation of Jews who do not confess faith in Christ.

According to the document: "THE GIFTS AND THE CALL OF GOD ARE IRREVOCABLE" (Romans 11:29) A reflection on theological issues pertinent to Catholic-Jewish relations on the occasion of the 50th anniversary of “Nostra ætate” (nº 4)", of the Commission for Religious Relations with the Jews, in chapter 5, paragraphs 35-36 it is stated that there is no other way than Jesus for salvation, which is obvious, but it is also stated that Jews who do not believe in Jesus as the Messiah of Israel and the Son of God are excluded from salvation, which is counterintuitive, because the doubt is present as to how they are saved, without believing. However, it is later said that it is an unfathomable mystery of faith, but I don't understand whether this is a doctrine of the church or not, but I assume so.

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Note: I know that this document is not magisterial or doctrinal, but that does not mean that it does not have church doctrines in it, which it actually does, in addition to the fact that it apparently has an official church doctrine, in this excerpt.