Why do many Israelites not believe in Christ?

The struggle of many Israelites to believe in Christ is addressed in Romans 9:30-32, where Paul highlights their attempt to establish righteousness through their own works, rather than through faith in Christ. Their reliance on the law led them to miss the purpose of the law, which points to Christ as the fulfillment of righteousness. This illustrates a broader principle of human nature, where self-reliance and a works-based approach can blind individuals to the grace offered through faith alone in Christ, causing them to stumble at the very cornerstone of salvation.