Umm, this has not much to do with what actually happened. Britain controlled Palestine under a League of Nations mandate, and allowed several hundred thousand Jews to immigrate there before WW II, in spite of opposition from Arab Palestinians. This was in accordance with the Balfour Declaration, which endorsed a "national home" for Jews in Palestine. Arab opposition became increasingly strident and often violent. In 1937, a British commission recommended partition of Palestine into Jewish and Arab zones. Due to vehement Arab protests, Britain abandoned partition plans in 1939.
After WW II, Britain dumped the mess in the UN's lap. The UN then voted to for partition, which meant creation of a Jewish state.But the decision was rooted in Arab-Jewish hostility from before the war.