In law this point was settled with the creation of the state of Israel. The map of the Middle East, as with much of the rest of the world, was redrawn at the end of the second world war. The resulting nations, many of them newly created following the collapse of the European empires, formed the constituent members of the UN. The very fact that the Palestinians have successfully mounted their case to the international community in a way that, for example, Kurds or Australian Aboriginals have not, would suggest that they have no need of a seat at the UN to be heard.