Arabs, not Jews, told their people to leave.

Khaled al-Azem was the Prime Minister of Syria in 1948. In his memoirs, published in 1973, he listed what he thought were the reasons for the Arab failure in their aggression against Israel 1948:

" ... the fifth factor was the call by the Arab governments to the inhabitants of Palestine to evacuate it and leave for the bordering Arab countries ... We brought destruction upon a million Arab refugees by calling on them and pleading with them to leave their land."
"Following a visit to refugees in Gaza, a British diplomat reported the following: 'But while they express no bitterness against the Jews...they speak with the utmost bitterness of the Egyptians and other Arab states: 'We know who our enemies are,' they will say, and they are referring to their Arab brothers who, they declare, persuaded them unnecessarily to leave their homes."
- British Foreign Office Document #371/75342/XC/A/4991

[From "Revising or Devising Israel's History" by Prof. Shlomo Slonim in Jewish Action, Summer 5760/2000, Vol. 60 #4]

Read more about this subject at: http://www.afsi.org/MEDIA/primerLinks/refugeescam.htm