Of course Orthodox Judaism is wrong. They denied Christ and now still "miss" that He came; no argument there but many traditions of men, even of the Reformers, are wrong. That's no argument at all that God is completely through with the "vine" that gentile believers were grafted into.
Certainly, but the vine consists of believers, starting from Abraham and going to the present day. It is not a vine built on an ethnicity. Never was. That was Jewish error, introduced among the many traditions of men fabricated by the Jews. Making it about an ethnicity was one of the errors of the Jews that was condemned in the New Testament, an error retained by them to this day. "And think not to say within yourselves, We have Abraham to our father: for I say unto you, that God is able of these stones to raise up children unto Abraham." - Matt 3:9.
