Interesting notes from the Wikipedia article:
http://en.wikipedia.org/wiki/Israeli%E2%80%93Palestinian_conflict
With the outcome of the First World War, the relations between Zionism and the Arab national movement seemed to be potentially friendly, and the Faisal–Weizmann Agreement created a framework for both aspirations to coexist on former Ottoman Empire's territories. However, with the defeat and dissolution of the Arab Kingdom of Syria in July 1920, following the Franco-Syrian War, a crisis fell upon the Damascus-based Arab national movement. Return of several hard-line Palestinian Arab nationalists, under the emerging leadership of Haj Amin al-Husseini, from Damascus to Mandatory Palestine marked the beginning of Palestinian Arab nationalist struggle towards establishment of national home for Arabs of Palestine. Amin al-Husseini, the architect of the Palestinian Arab national movement, immediately marked Jewish national movement and Jewish immigration to Palestine as the sole enemy to his cause,[10] initiating large-scale riots against the Jews as early as 1920 in Jerusalem and in 1921 in Jaffa. Among the results of the violence was the establishment of Jewish paramilitary force of Haganah. In 1929, a series of violent anti-Jewish riots was initiated by the Arab leadership. The riots resulted in massive Jewish casualties in Hebron and Safed, and the evacuation of Jews from Hebron and Gaza.
In the early 1930s, the Arab national struggle in Palestine had drawn many Arab nationalist militants from across the Middle East, most notably Sheikh Izaddin al-Qassam from Syria, who established the Black Hand militant group and had prepared the grounds for the 1936 Arab revolt. Following, the death of al-Qassam by the hands of the British in late 1935, the tensions erupted in 1936 into the Arab general strike and general boycott. The strike soon deteriorated into violence and the bloody revolt against the British and the Jews. In the first wave of organized violence, lasting until early 1937, much of the Arab gangs were defeated by the British and a forced expulsion of much of the Arab leadership was performed. The revolt led to the establishment of the Peel commission towards partitioning of Palestine, though was subsequently rejected both by Palestinian Jews and Palestinian Arabs. The renewed violence, which had sporadically lasted until the beginning of WWII, ended with around 5,000 casualties, mostly from the Arab side. With the eruption of World War II, the situation in Mandatory Palestine calmed down. It allowed a shift towards more a moderate stance among Palestinian Arabs, under the leadership of the Nashashibi clan and even the establishment of the Jewish-Arab Palestine Regiment under British command, fighting Germans in North Africa. The more radical exiled faction of al-Husseini however tended to cooperation with Nazi Germany, and participated in the establishment of pro-Nazi propaganda machine throughout the Arab world. Defeat of Arab nationalists in Iraq and subsequent relocation of al-Husseini to Nazi-occupied Europe tied his hands regarding field operations in Palestine, though he regularly demanded the Italians and the Germans to bomb Tel Aviv. By the end of World War II, a crisis over the fate of the Holocaust survivors from Europe led to renewed tensions between the Yishuv and the Palestinian Arab leadership. Immigration quotas were established by the British, while on the other hand illegal immigration and Zionist insurgency against the British was increasing.
This war seems to be self sustaining - right from the start.