"And this gospel of the kingdom will be preached in all the world as a witness to all the nations, and then the end will come." That's the conclusion of the Great Commission: “Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all things that I have commanded you;” That's the definitive sign of the end, and Israel must be among "all nations". In fact, Israel will be the last, for "the first will be the last and the last first." This is all prophecy according to God's schedule, they'll come to Jesus in one way or another.
Besides, there's the parable of the fig tree, which points to non other than the revival of Israel. During Jesus's ministry, Jesus cursed the fig tree for its being fruitless, causing it to rapidly wither away, that was the fall of Israel; when the same tree grows out new leaves, that's the revival.