Actually the Arab Armies ORDERED them out with threats of murder if they stayed.
Got a link?
1948 Palestinian exodus - Wikipedia
"The precise number of
refugees, many of whom settled in
refugee camps in neighboring states, is a matter of dispute
[4] but around 80 percent of the Arab inhabitants of what became Israel (half of the Arab total of Mandatory Palestine) left or were expelled from their homes.
[5][6]
"About 250,000–300,000 Palestinians fled or were expelled before the
Israeli Declaration of Independence in May 1948, a fact which was named as a
casus belli for the entry of the Arab League into the country, sparking the
1948 Arab–Israeli War.
"The causes are also a subject of fundamental disagreement between historians.
"Factors involved in the exodus include Jewish military advances, destruction of Arab villages, psychological warfare, fears of another massacre by Zionist militias after the
Deir Yassin massacre,
[7]:239–240 which caused many to leave out of panic, direct expulsion orders by Israeli authorities, the voluntary self-removal of the wealthier classes,
[8] collapse in Palestinian leadership and Arab evacuation orders,
[9][10] and an unwillingness to live under Jewish control.
[11][
dubious – discuss]
[12]"