Mehdi, the 240,000 Jews who reached British Mandate Palestine between 1932 and 1939 had no army and no state, and they drove no one from their homes. They legally purchased land, much of it swamp and sand dune, often from absentee Arab landlords, and the Arab population roughly doubled under the Mandate.
By 1947, Jews privately owned between 7% and 10% of the land west of the Jordan River, and Arabs privately owned roughly 12% to 15%. Most of the rest was state land the British had inherited control of from the Ottomans. The 1947 partition plan proposed two states for two peoples on that remaining quarter of the original British Mandate, after Britain had already carved out the other three quarters to create Transjordan, an Arab kingdom it invented. Private land deeds had nothing to do with it.
The violence in the region originated with the Arab leadership. In 1920, Haj Amin al-Husseini helped whip up the Nebi Musa riots in Jerusalem. In 1929 he and his circle spread the lie that Jews were plotting to seize or destroy al-Aqsa, and the pogroms that followed murdered 67 Jews in Hebron and 18 in Safed. In 1936 the same leadership launched a revolt, murdered more Jews, and pushed Britain into the 1939 White Paper, which capped Jewish immigration at 75,000 over five years while Hitler was closing in on European Jewry. After helping stoke the 1941 Farhud pogrom in Baghdad, which killed nearly 180 Jews, the Mufti spent the rest of the war in Berlin lobbying for a Middle East emptied of Jews.
The crimes you list did happen, but the Jews were the victims.
After 1948, roughly 850,000 Jews were driven out of Arab countries and their property was seized, and Jordan expelled the Jews of Jerusalem's Old City that same year.
None of this is obscure, and you know it. Calling it “pure dumbness” would let you off too easily. In your case it's pure mendacity.