The Gemora in Megilla 12A says in the name of Rova. There is a contradiction in one place it says that Golus Bovel will finish after 70 years of Bovel’s rule, and in the other place it says that 70 years are counted from the destruction of the Beis Hamikdosh. Rova answers that after 70 years they will be remembered. Rashi explains that at that time they received permission to settle in Eretz Yisroel. I think that our current situation is similar. As the Golus is coming to an end, we are remembered, and we are able to live in Eretz Yisroel.
Ability to live in Eretz Yisroel