Funny how this is popping up lately, in one form or another, on peoples' minds. No, the New Covenant has not come to Israel yet, or should better say, they've not availed themselves of the New Covenant, in their unbelief, are suffering a blindness. Zechariah 12:9-14 describes a post-Armageddon scene of the Jews coming to see the Lord, and He pouring out His grace and supplications on them. There's also this teaching as to the program in Romans 11, which Patrick Jane also rightly referred to. Israel has the time of Jacob's trouble yet ahead, Jeremiah 30:7.
Romans 11
25 For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in.
26 And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:
27 For this is my covenant unto them, when I shall take away their sins.
28 As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the fathers' sakes.
29 For the gifts and calling of God are without repentance.
30 For as ye in times past have not believed God, yet have now obtained mercy through their unbelief:
31 Even so have these also now not believed, that through your mercy they also may obtain mercy.
32 For God hath concluded them all in unbelief, that he might have mercy upon all.
33 O the depth of the riches both of the wisdom and knowledge of God! how unsearchable are his judgments, and his ways past finding out!
34 For who hath known the mind of the Lord? or who hath been his counsellor?
35 Or who hath first given to him, and it shall be recompensed unto him again?
36 For of him, and through him, and to him, are all things: to whom be glory for ever. Amen.
Something that should be noted, those who say evil against the Jew, we are warned, "lest ye should be wise in your own conceits." Israel is still chosen of God, the holder of all the provisions of the Old Covenant that are eternal promises.