Shalom judeanoncapta,
In the book of Jeremiah it states:
Jeremiah 29: 4-7
4. So said the Lord of Hosts, the G-d of Israel, to all the exile which I have exiled from Jerusalem to Babylon:
5. Build houses and dwell [therein], and plant gardens and eat their produce.
6. Take wives and beget sons and daughters, and take wives for your sons and give your daughters to men, and they shall bear sons and daughters, and multiply there and be not diminished.
7. And seek the peace of the city where I have exiled you and pray for it to the Lord, for in its peace you shall have peace.
Apparently Jews were encouraged to make lives for themselves in Babylon until the exile was over. There seems to be no encouragement here for a "Zionist" movement to resettle the land. Later the Jews came back when the 70 year exile was over, and were later exiled a second time. Were they supposed to make attempts to resettle the land after the second exile? They did during the Bar Kochba revolt and were crushed. If no time frame for an exile is given, how do Jews know whether it's right to return to the land or remain in exile as Jeremiah 29 talks about?