Actually, everything after the Cross was directed to Israel as well. For the first full seven chapters of Acts -- a quarter of the book.
And then this mystery, hid in God from the foundation of the world is revealed to Paul. And everything changes. Although until Acts 28, Israel is still being offered the promises and prophecies concerning the return of Christ and the setting up of the Kingdom.
Once understood that the gospel of the circumcision would stay with Peter and the gospel of the uncircumcision would be preached by Paul, there was a real time of uncertainty in Israel's program. By the end of Acts, it is apparent that a change in dispensations had taken place. And that Israel had been temporarily blinded and set aside for another purpose that had never been revealed before Paul.