“Disagreeing among themselves, they began to leave after Paul made one statement: “The Holy Spirit correctly spoke through the prophet Isaiah to your ancestors when He said, Go to these people and say: You will listen and listen, yet never understand; and you will look and look, yet never perceive. For the hearts of these people have grown callous, their ears are hard of hearing, and they have shut their eyes; otherwise they might see with their eyes and hear with their ears, understand with their heart, and be converted, and I would heal them. Therefore, let it be known to you that this saving work of God has been sent to the Gentiles; they will listen! ””
Acts 28:25-28 HCSB
The gospel has always been intended for the Jewish people, sadly many of them have chosen not to believe, something that was foretold by Isaiah. From there it went to the Gentiles.