As the Body of Messiah, we recognize that in terms of history, culture, and covenants, the Gospel was promised and preached to the Jews first, then to the Gentiles. This does not mean that the Gospel is exclusively for the Jews, but that as a chosen nation, God revealed Himself to them first.
Gentiles are charged to preach the Gospel to Jews and Gentiles.
For I am not ashamed of the gospel of Christ, for it is the power of God to salvation for everyone who believes, for the Jew first and also for the Greek. (Rom. 1:16 NKJV)
But you shall receive power when the Holy Spirit has come upon you; and you shall be witnesses to Me in Jerusalem, and in all Judea and Samaria, and to the end of the earth. (Acts 1:8 NKJV)