Why did Jewish immigration to Palestine increase during the British mandate?

During the British mandate, Jewish immigration to Palestine increased due to a combination of international legal frameworks and the rise of persecution in Europe.

The British mandate, which incorporated the Balfour Declaration, formally obligated the British administration to facilitate Jewish immigration and the establishment of a "Jewish National Home" in Palestine.12

However, the most significant impetus for the surge in immigration during the 1930s was the rise of the Nazi Party in Germany in 1933 and the subsequent widespread persecution of Jews across central and eastern Europe. This forced many Jews to seek refuge, causing immigration numbers to rise sharply—from 30,000 in 1933 to 61,000 in 1935.12

While the British initially encouraged immigration in the 1920s, the resulting tensions and violence between the Arab and Jewish communities eventually led Britain to restrict immigration in 1939 in an attempt to maintain regional stability and retain Arab support during World War II.34