Exactly. Remember, though, why the Gentile Christians were evangelized?
Jesus says clearly to the Samaritan woman who asks for her son’s healing that He came for the salvation of the Jews: “It is not right to take the children’s food and toss it to their pet dogs.” And yet, “the builders rejected” Him. So then, Jesus met Paul and told him that he would send him to the Gentiles.
Also remember the story of Cornelius. Peter’s vision causes him to realize that it was not really about food, but rather that God was giving Gentiles the opportunity to believe and be saved.
Now, to be fair, it is not the only reason that there may be non-jewish believers, such as Ruth. But the reason why Gentiles as a whole were given the opportunity to be saved was because the Jews rejected the promise.