God promised Israel that if they rebelled, He would scatter them over the face of the earth (Deuteronomy 28:64-68, Nehemiah 1:8). This is called the Dispersion/Diaspora.
God promised Israel that at the end of this age, He would restore them to the land which He promised to Abraham, Isaac, and Jacob (Ezekiel 37:21, Jeremiah 23:3)
More and more Jews are coming to Israel daily. The year 2014 shows the greatest number of Jews returning to Israel since it was reborn as a country.