That 2 thousand years had passed by since the Jews were driven from their homeland. Zionist believed Hosea chapter 6.
"Come, let us return to the LORD. For He has torn us, but He will heal us; He has wounded us, but He will bandage us. "He will revive us after two days; He will raise us up on the third day, That we may live before Him. "
the 2 days there they interpret as 2 thousand years. That's indicated also in both OT and NT.
…3You turn man back into dust And say, "Return, O children of men." For a thousand years in Your sight Are like yesterday when it passes by, Or as a watch in the night. You have swept them away like a flood, they fall asleep; In the morning they are like grass which sprouts anew.…
2 Peter 3:8
But do not forget this one thing, dear friends: With the Lord a day is like a thousand years, and a thousand years are like a day.
Zionist believed it was time for "Aliyah" or return to Israel, to Jerusalem. In the 30's when Hitler came to power they even encouraged him to pressure the Jews there to emigrate to British Palestine, but then the Brits cut that off to a very few at the urging of the local Palestinians. Of course then the Zionist began actions in Palestine against the Brits, with bombs and killings.
Germany did begin persecution of Jews, but instead of going to Palestine, they fled into other European countries, where many of them later again fell under Nazi rule and we know how that ended for many.
So, was God calling them and they refused the call? Prophecy seemed right on and history has put an Israel back where it was before, seemingly where it was never expected to be again, except by some who were considered radical or errant in their belief. It seemed never to happen until almost the time it did.
Jews still ask themselves why God allowed what happened with the Holocaust. Maybe that's why, because they refused the call to return?
Romans chapter 11 talks of a time the Jews will become united in Jesus with those who are his followers, obviously at a second coming. It says they will be grafted back to the rootstock of the olive tree from which they'd been cut off.
Christians also realized for Revelation to be accurate, at some point the Jews had to be back in Jerusalem and in control of the area for the Final War to happen. Now that stage is set.
There's more depth to it, that's a very brief outline of it.
Wherever the Jews went, that's where Hitler and the Nazis followed, so there's one reason Netherlands were invaded too.
Spiritual forces are not easily seen nor understood, but that's why we have prophecy, to recognize those movements in the times they happen, and to remind us it's all been told before, therefore God.
Ephesians 6:12King James Version (KJV)
"For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places."