Well, there’s the Jewish perspective and the Christian-Catholic perspective. For the latter, we refer to Romans 12 (isn’t it) where Paul talks about how important Judaism is in God’s plan.
Roy Shoeman (“showman”) is a Jewish convert to Catholicism and speaks about the topic of this thread, trends. I think he has a website, there are youtube videos featuring him, and of course his groundbreaking book, Salvation is from the Jews.
They all speak better to the subject than I can. As a preview, though, Shoeman discusses the conversion of Jews to Christianity before the Messiah comes, to us, Jesus in judgment. And he points out that there are congregations of Messianic Jews in a lot, perhaps many of the cities of the state of Israel.
He hypothesizes that God has maintained the identity of the Jewish people as a reminder of his covenants and of the divine plan for salvation, as Paul might say, Jews first, then Gentiles. He mentions that all the tribes and nations mentioned in the Bible have vanished – the Jebuzzites, the Hittities, the Amelekites, etc. – gone, but not the Jews.
He converted to Catholicism rather than any other Christian denomination or the orthodox churches, because, as I understand him, he thought the Catholic Church far and away was the logical continuation and consequence of Judaism.
aside: I am interested in the Jewish scriptures as much as the New Testament scriptures. I just received in the mail today, my latest book choices from the Jewish Publication Society, Alan T. Levenson’s Joseph: portraits through the Ages, and Rabbi Niles Elliot Goldstein’s*** Eight Questions fo Faith***:*** Biblical Challenges that Guide and Ground our Lives. ***