what you are asking for is just like after 2000 years from Now, the native indians decides to expel the whole population of the USA out back to where their great great grandparents came from. if you add to it, the fact, that not all jews left Palestine 2000 years ago, and jews lived with other people on the same land, so they don't historically owned the whole land of Israel. when God gave the land to Abraham and his children, he gave him up till his sight can see, which is about 8 square kilometer. this is your land in Israel,who you suppose to share with all the children of Abraham including the Arabs,since they are from Ishmael, the rest is for the other people who ever lived there including the Romans. tell me, when the 12 tribes moved to Egypt and got slaved for 400 years, who were living in Palestine?, was it left an empty land? no, but it shows your opportunistic character, if it serve your purpose you jump on it, and if not, you just abandon it,justice the Israeli way.
IDF soldiers find improvised weapons and ammunition at Jenin refugee camp (Haaretz)
from the article: IDF bid to expel West Bank Palestinians is a step too far