Does Paul teach in Acts 28 that all Gentiles will be saved?
Paul's Acts 28 declaration does not teach universal Gentile salvation. Salvation of God is sent to the Gentiles, and they will hear it, but the text does not say all will be saved. That hearing leaves the world guilty and without excuse.
Les teaches that by Acts 28 Paul has finished his missionary journeys and is now imprisoned in Rome, where he meets with Jewish leaders. Paul reviews how all the Old Testament covenant promises had been presented to Israel, but Israel rejected them when they crucified their Messiah, leaving in discord and disagreement. Paul then declares that the salvation of God is sent to the Gentiles, and they are going to hear it. Les emphasizes that this does not mean all Gentiles will be saved—no way. They will hear it, and Scripture shows they have. That hearing is why all the world stands guilty, and why Romans 1 says they are without excuse. With Paul's apostleship, the calling out into the body of Christ is now predominantly Gentiles, though Jews can become believers and are few and far between—a complete flip-flop from Jew only with some Gentile exceptions to Gentiles with exceptional Jews coming in.
More Questions
What did Paul declare to the Jews in Acts 28 about salvation going to the Gentiles?
In Acts 28 Paul declares that the salvation of God is now sent to the Gentiles, and they are going to hear it.