Reality: the ethnic cleansing of what later became Israel started before the Arab armies intervened or even before the British left. In fact, most Palestinian cities were conquered before the declaration of independence.
Fact: the only army that equaled the Jewish army during the war was the British-trained Jordanian Legion, which generally respected the UN partition plan & didn't invade what became Israel.
Fact: many Palestinians escaped after hearing of massacres such as Deir Yassin. Others escaped the Israeli shelling of civilian areas. Some were deported at gunpoint.
Fact: 1000s of Palestinians shot by Israeli soldiers after attempting to return to their homes & fields in what became Israel (many of them from #Gaza).