God's pardon will, even yet, as always, follow upon confession of sin and genuine repentance. They must recognize not only that they have sinned, but that their sufferings have been a punishment for those sins at God's hand.
This will work in them humble acquiescence in God's doings, and then he will remember his covenant with Jacob, and also his covenant with Isaac, and also his covenant with Abraham, and for the sake of the covenant of their ancestors, he will not east them away, neither will he abhor them, to destroy them utterly, and to break his covenant with them.
Whether Jewish repentance has been or ever will be so full as to obtain this blessing, cannot be decided now. Perhaps it may be the case that all the blessings promised by Moses and by future prophets to repentant and restored Israel are to find their accomplishment in the spiritual Israel, the children of Abraham who is "the father of all them that believe" (Romans 4:11), seeing that "God is able of stones to raise up children unto Abraham" (Matthew 3:9).