Israel painted the picture in 1948.
"After the war, the United Nations estimated 711,000[20] Palestinian Arabs, out an estimated 1.8 million dwelling in the Mandate of Palestine,[21] fled, emigrated or were forced out of Israel and entered neighboring countries.
"
By 1949, there were 110,000 Palestinian Arabs in Lebanon,[22] moved into camps established by and administered by the United Nations Relief and Works Agency for Palestine Refugees in the Near East.[23]
"With the exception of two camps in the Beirut area, the camps were mostly Muslim.[23]
"Lebanese Christians feared that the Muslim influx would affect their political dominance and their assumed demographic majority.[23]
"Accordingly, they imposed restrictions on the status of the Palestinian refugees.
"The refugees could not work, travel, or engage in political activities.
"Initially the refugees were too impoverished to develop a leadership capable of representing their concerns.[23]
"Less democratic regimes also feared the threat the refugees posed to their own rule, but Lebanon would prove too weak to maintain a crackdown.[3]
"The Palestine Liberation Organization (PLO) recruited militants in Lebanon from among the families of Palestinian refugees who had left Israel in 1948."
Israeli?Lebanese conflict - Wikipedia, the free encyclopedia
Imagine the magnitude of that desperation.