Why can't the Jewish people see that the Law has come to an end?
A veil remains over their hearts and minds when Moses is read, blinding them to the truth that the Law was abolished in Christ. In unbelief they still tie themselves to the Law and cannot see that it has come to an end, despite God's better provision of salvation by grace through faith.
Les explains that the veil was not taken away in the reading of the Old Testament, but is done away in Christ. When Christ finished the work of redemption through His death, burial, and resurrection, the whole system of Law was abolished because something far better had come. The Law was given to Israel to prepare them for Messiah, but in unbelief they failed. God still carried out redemption, revealing to Paul salvation by faith through God's grace with nothing added. The average Jew, in blindness, still ties himself to the Law; the veil remains on Moses' head, so they cannot see it has ended. Even when Moses or the Torah is read in synagogue worship, the veil remains on their heart. They are sincere, and Paul felt the same toward them. The veil kept Israel from seeing the Law was fading away and that something better had come in its place.