In 1922, decades before World War II ended and the nation of Israel was established on top of the nation of Palestine, the land was far from homogeneous.
A League of Nations report recorded over 73 thousand Christians and more than 83 thousand Jews called the land their home. Furthermore, the overwhelming majority of Palestine were Muslim — over 590 thousand.
Evidence shows that the land of Palestine was peaceful during this time. The diverse population in Palestine lived together without quarrelling. For instance, take a look at this montage of clips from 1896 Palestine.
The demographics of Palestine severely changed after the creation of Israel in 1948. By 1948, 82% of the population were Jewish. A mere 26 years after the League of Nations report.
Demographic fluctuation accounts for why there were 700,000 Muslim and Christian Palestinian refugees after 1948. This also provides strong evidence for why there are an estimated 7.2 million Palestinian refugees today.