Can Jews still become believers in the gospel of grace today?

Les explains that by Acts 28, after Paul finished his missionary journeys and was imprisoned in Rome, he met with the Jewish leaders and reviewed how all the Old Testament covenant promises had been presented to Israel, but they rejected them when they crucified their Messiah. They left in discord and disagreement, unable to believe. Then Scripture declares that the salvation of God is sent to the Gentiles, and they will hear it. Les notes this does not mean all Gentiles will be saved, but they will hear, and that is why the world stands guilty and without excuse according to Romans 1. So with the advent of the Apostle Paul going out, the calling is now predominantly Gentiles—Gentiles only with exceptions. The exceptions are Jews. Les says Jews can become believers of this Gospel, but they are few and far between. By far the most called out into the body of Christ are from among the Gentiles. It has been a complete flip-flop: formerly it was Jew only with some exceptions of Gentiles, but now it is Gentiles with some exceptional Jews coming in.