The Jews did, indeed, stumble at the stumbling-block mentioned in Romans 9:32-33. Many were offended at Christ. But did their stumbling involve their utter and final ruin? It had a far more beneficent purpose than that. It brought salvation to the Gentiles, and it did this only to react as an incentive upon the Jews.
For to provoke them to jealousy. — The reason why salvation had been extended to the Gentiles was to stir up them (the Jews) to emulation. Their privileges had made them negligent and apathetic. The sight of others stepping into those privileges was to rouse them from their apathy