Arabs began flooding into Palestine in large numbers after Zionists began arriving there.
As diaspora Jews returned to their ancient homeland in the early nineteenth century, Arabs came as well, although their presence in the land remained generally sparse.
This from frontpagemag.com.
In 1830, Muhammad Ali of Egypt conquered Jaffa, Nablus, and Beisan, and settled Egyptian and Sudanese Muslim Arab soldiers there.
Approximately the same time, the French conquest of Algeria led to an exodus of North African moslems who refused to live under infidel rule. They came in large numbers to Palestine. Once there, they followed the pattern of the Turks and other Arab moslems in making life as difficult as they possibly could for the Jews.
An English clergyman, the Reverend W. M. Christie, who lived in Haifa in the early twentieth century, noted:
They…