Baha'u'llah will gather together all IsraelAbdul Baha :
...and that incomparable Branch will gather together all Israel: signifying that in this cycle Israel will be gathered in the Holy Land, and that the Jewish people who are scattered to the East and West, South and North, will be assembled together.
Now see: these events did not take place in the Christian cycle, for the nations did not come under the One Standard which is the Divine Branch. But in this cycle of the Lord of Hosts all the nations and people will enter under the shadow of this Flag (Baha'i Faith). In the same way, Israel, scattered all over the world, was not reassembled in the Holy Land in the Christian cycle; but in the beginning of the cycle of Bahá’u’lláh this divine promise, as is clearly stated in all the Books of the Prophets, has begun to be manifest. You can see that form all the parts of the world tribes of Jews are coming to the Holy Land; they live in villages and lands which they make their own, and day by day they are increasing to such an extent, that all Palestine will become their home.—Some Answered Questions, p. 75–76.
(Bahá’u’lláh and the New Era, 1980 Edition)