That's why there are wars between the Palestine´s and the Israelis, to get land.

And God promised Abraham the land and God gave the Jewish people some of the lands from the Palestine´s because they were a poor country and had barely any land. That´s why some of the Jewish people left to find other land but then they came back because they knew that God was gonna give them some of the lands later on.

They were driven out of Israel mainly by the Romans and the Arabs.

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Some of the Jewish people did, not all of them. They had less and less land every time that they fought a war. The only reason why they came back is that they wanted to get the land back because of the wars that went on between the Palestine´s and the Israelis.

Israel fought three wars during the time against its neighbors and lost many cities and land so they needed the land from the Palestines so and when God promised the land to Abraham before and gave land to the Israelis also before, they lost some and most of their land from the wars they lost and they needed land back. The Palestine´s did not have much of a choice but they did and when they did they often needed to cross the Israelis territories and when they did, they didn´t care because it was their land before.

Therefore I think that the Palestine´s should give more land each time that they trespass or anything that involves Israels space between borders/territories.