God promised the land to the Jews and since Israelis are Jews they should be able to have some land also. They shouldn't be kicked out off the land just because they left 2,000 years ago. Also, the International community granted the Jewish people the land back in 1948 so they should be able to keep some of the land.
Even though the Jewish people were the ones who left the land I believe that sharing the land would be a good compromise. Both the Palestinians and the Israelis were promised the land at different points in their lives. They could share the land and have it be a 2 state country. They would be able to share Jerusalem and have it so both the Palestinians and the Israelis could enter.