The Bible - Specifically the New Testament - says:
"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. And so all Israel shall be saved..." - Romans 11:25,26a (Audio)
This is a prediction that has not yet been fulfilled. But that fulfillment may be coming very very soon.
The Apostle Paul writes in 2 Thessalonians 2:3,4a (Audio):
"Let no man deceive you by any means, but that day shall not come unless there come except there come a falling away first, and the man of sin be revealed, the son of perdition, who opposeth and exalteth himself above God."
This prophecy is being fulfilled right before our eyes (See Pastor Kevin Swanson's Millennials - Only 2% Christian - Time for a Worldwide Council). While as a Christian I'm grieved at the great apostasy I see, I look with anticipation to the day when the blinders will come off and the Jewish people will recognize their long-awaited Messiah - Our Lord Jesus Christ.
And it may be that the Rabbis - the Jewish religious leaders of our day - may fiercely oppose this, just as they did 2,000 years ago. But when the average Jew starts reading THEIR Bible - especially passages like Psalm 22 (Audio), Isaiah 53 (Audio) & Daniel 9 (Audio) - then we will see a national conversion of the Jewish people to Christianity.
Recommended sermons:
The 70 Weeks Prophecy, by Rev. John Sawtelle [Text: Daniel 9:20-27 (Audio)]
Great Events Preceding Christ's Return: The Conversion of the Jews, by Rev. Kevin Macleod