We were given the Holy Land by G-d in order to be able to study and practice the Torah without disturbance and to attain levels of holiness difficult to attain outside of the Holy Land. We abused the privilege and we were expelled. That is exactly what all Jews say in their prayers on every Jewish festival, "Umipnay chatoenu golinu mayartsaynu" - "Because of our sins we were expelled from our land".
We have been forsworn by G-d "not to enter the Holy Land as a body before the predestined time", "not to rebel against the nations", to be loyal citizens, not to do anything against the will of any nation or its honour, not to seek vengeance, discord, restitution or compensation; "not to leave exile ahead of time." On the contrary; we have to be humble and accept the yoke of exile. To violate the oaths would result in "your flesh will be made prey as the deer and the antelope in the forest," and the redemption will be delayed.