They Could Have Helped
  Romans 11: 12 speaks how the fall of the Jews had brought opportunity for salvation to all mankind. The termination of the Law of Moses would be considered by the Jew as a fall. But remember that God always intended and planned that salvation be universally offered. The rejection of Christ by the Jews hastened that opportunity being extended to the Gentiles.

  Paul reasoned how the fall of the Jews brought opportunity to others, but how much more good could have been accomplished if the Jews had favorably responded to the gospel. Some did but most did not. That would have been a powerful influence for good to both Jew and Gentile.