Yes, the problem is that nobody bothered to ask the people already living there what they thought of the divying up of the land. And before the Palestinians, nobody bothered to ask the Jews if they wouldn't mind vacating either. The Romans were a lot less friendly about removing the Jews from their lands:
http://www.jewishvirtuallibrary.org/...m/revolt1.html http://www.lamp.ac.uk/~noy/Jews16b.htm http://www.fact-index.com/s/si/simon_bar_kokhba.html
The FACT that the Jews were there is a matter of historical fact of course.
And the truth is, its one of those things that's happened a lot throughout history. Ethnic groups of people have been dispossessed of their lands many times in history. The Soviet Union drove all Germans from the numerous lands their ancestors had possessed for well over 1000 years. Germany has taken the loss without compensation and what was once East Prussia is still inexplicably held by Russia. Germans have left well enough alone on the matter. Last I heard, there is no a major problem with Germans blowing themselves up in the middle of Russian and Polish crowds. Tibet did not ask for China to invade them. They did not ask for their foremost religious leader to exiled. And yet, I don't know of a major problem with Tibetan peoples undertaking suicide bombing in an effort to liberate themselves.
So the world is unfair at times. Still, take into account that the Muslim peoples have never made any apology for the Armenian Holocaust. If we're forcing the world to be completely fair, then let it work both ways.