That's not quite the whole story. When the Mandate was partitioned, the West Bank was supposed to become the new Palestinian State, but the King of Jordan made a deal with Ben-Gurion to make it part of Jordan. The rest of the world, having salved its conscience for not assisting the Jews trying to flee Nazi Germany, washed its hands and walked away. The original UN resolution is still in force. I think all sides missed a golden opportunity to create a viable Palestinian state following the 1967 war. Israel is now about 70 years old but if it continues it repressive,imperialistic policies in the West Bank, it may well not survive to 100 except as regime as repressive as those of many of its neighbors.