It's this reinvention of scripture to suit the moment that I often see among the Catholics. And, yes, they also like to post lots of scripture that has absolutely nothing to do with the premise of the argument.
The point has been all along that Israel WILL remain in unbelief until "the time of the Gentiles be fulfilled", just as Jesus said. The restoration of Israel WILL happen because God says it will and the only reason we are talking about this now is because there are signs, and have been signs, that point to this happening sooner rather than later. The very fact of the nation of Israel being back in their homeland ESTABLISHED as a nation once again from two thousand YEARS of not being a nation is a biggie sign. Israel HAS been desolate because they rejected the Messiah, Jesus Christ, but one day soon (I believe) they will be brought to repentance:
And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplications: and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn. (Zechariah 12:10)
That has not happened yet although there have been many Jews that HAVE believed in Jesus. As a nation, no. But they WILL as a nation, as a people, return to Jehovah and believe in Jesus as their Messiah and be saved. They WILL one day say, "Blessed be the name of the LORD." and God's promises to them, to their father Abraham, will be completely fulfilled.