Why are the children of Israel still blinded to the end of the Law?

The children of Israel are still blinded because Moses' veil pictured their inability to see the end of the Law. That entire system has passed off the scene, abolished and replaced by the revelation of the mysteries—the grace of God. They remain unable to steadfastly look to its termination.

The passage says the children of Israel could not steadfastly look to the end of that which is abolished. Les explains that when Moses put the veil over his face, it was not that Israel could not stand the brightness of his complexion, but that they could not see the end of the whole system of Law. He says they are blinded to that fact to this day: the whole system of Law has passed off the scene, it is abolished, and in its place is the tremendous revelation of the mysteries, the grace of God.

2 Corinthians 3:13

And not as Moses, which put a vail over his face, that the children of Israel could not stedfastly look to the end of that which is abolished:

Are the Jews still blinded to the fact that the Law has been abolished and replaced by grace?

Yes. Israel remains blinded to the truth that the whole system of Law has passed off the scene, is abolished, and has been replaced by the tremendous revelation of the mysteries—the grace of God. This blindness continues to this day, so they cannot see the end of that abolished system.