The leader of the Apostles (Apostle to the Circumcision) ratified this in his first epistle explicity identifying the Jews of the Diaspora as
1 Peter 1:
[1] Peter, an apostle of Jesus Christ, to the strangers scattered throughout Pontus, Galatia, Cappadocia, Asia, and Bithynia,
They were Jewish CHRISTIANS, one in Christ Jesus. The end for the Jewish Nation of Israel (not the INDIVIDUAL people) was at the stoning of Stephen. 490 years EXACTLY as prophesied by Daniel.
Historical Setting. The apostle writes what might be termed a circular letter addressed to “strangers scattered throughout Pontus, Galatia, Cappadocia, Asia, and Bithynia.” These five areas included almost the whole of what is now called Asia Minor. The majority of the believers of these churches were Gentiles. Jewish Christians were in the minority. As their appointed missionary (Gal. 2:9), Peter was especially interested in the Jews, but he was not restricting his greetings and instruction to the minority group in these churches, as is indicated by his referring to his readers as formerly not of the people of God, and as converted idolaters (1 Peter 2:10; 4:3, 4). The apostle, who was the first to baptize Gentiles and to assert their equal status in the church, would no doubt regard all Christians, of both Jewish and Gentile origin, as one in Christ Jesus, without distinction in addressing them. SDA Bible Commentary