The Middle Eastern territories of the Ottoman Empire, which lost World War I, were divided between Britain and France through the Sykes-Picot Agreement, as both powers had long harbored imperial ambitions in the region. Under this agreement, Britain established a mandate administration over Iraq, Jordan, and Palestine. By the late 19th century, Palestinian Arabs, already aware of the dangers of Zionism, initially approached the British Mandate period middle of the road but strongly rejected the Balfour Declaration, as well as the ideas of Jewish immigration and the establishment of a Jewish homeland. This study examines the role Britain played during its nearly thirty-year administration of the Palestine Mandate, drawing primarily on the memoirs of the Christian musician from Jerusalem, Wasif Jawhariyyeh, and incorporating the perspectives of contemporary Muslim, Christian, and Jewish figures. Promising an independent homeland to Arabs and a Jewish national home to Jews, Britain pursued a turbulent policy throughout its three-decade rule, ultimately laying the groundwork for the modern Palestine-Israel conflict. Many Arab intellectuals and politicians of the period, including Wasif Jawhariyyeh, greeted the British Mandate with hope and great enthusiasm fueled by nationalist sentiments. However, as reflected in the accounts of Jawhariyyeh and many others, this initial sense of hope gradually gave way to feelings of betrayal and anger. These emotions were not confined to Palestinian Arabs but also extended to British soldiers and administrators, whose position grew increasingly uncertain, and Zionist Jews, who feared losing the promised Jewish homeland. This study explores the British Mandate period through the lens of these sentiments, offering an alternative perspective by utilizing memoirs, biographies, and historical correspondences. In conclusion, this research seeks to analyze the impact of the British Mandate on social life and emotions, focusing less on political history and more on highlighting different dynamics, ultimately revealing the profound disillusionment experienced. The study emphasizes the significance of Wasif Jawhariyyeh, a Jerusalemite who witnessed the late Ottoman period, the mandate administration, and the Nakba, in enabling a social and intellectual historical analysis. Moreover, given that most studies on the Mandate period primarily assess its political dimensions, Jawhariyyeh’s memoirs fill a significant gap in the literature.