No, Jews were not always living on the land, that's Zionist propaganda. When Christianity became the state religion in 380 AD only Christians could reside in Palestine. The bulk of the those practicing Judaism or other religions converted to Christianity in order to continue residing in Palestine. No Jews until 614 AD when the Persians conquered Palestine in 614 AD, Jews were allowed to re-enter as they were part of the Persian Army. When the Romans re-acquired Jerusalem in 628 AD, the Jews were sent packing as they were enemy combatants.
The rest of the story includes the 100+ years of the Latin KIngdom of Jerusalem where no Jews or Muslims were allowed to live in Palestine. Again, no Jews living on the land.
Just facts, son. Inconvenient facts for you.
As far as Judenrein, too late for that. The West made a mess of it with the Balfour Declaration which formalized the colonization of Palestine by Europeans and the expropriation of the land from the native Muslims and Christians. Expropriation which continues today.
What is needed is the conversion of the Apartheid Theological state Israel to a democratic and secular state with equality for all the people that now live under Jew control.