The question of whether Palestine is a Muslim land or a Jewish land is a complex and sensitive issue. Palestine has a rich history with diverse religious and cultural backgrounds, including Muslims, Jews, Christians, and others. Over the centuries, different groups have inhabited the region, and their presence has shaped its identity.
Regarding the second part of your question, during the early 20th century, Britain issued the Balfour Declaration in 1917, expressing support for the establishment of a "national home for the Jewish people" in Palestine. This declaration was influenced by various factors, including political, strategic, and humanitarian considerations.
One political motive behind Britain's decision was to gain support from Jewish communities in Europe and the United States during World War I. Additionally, Britain saw the migration of Jews to Palestine as a way to secure influence in the region and maintain control over the Suez Canal, a vital strategic point for their imperial interests.
Furthermore, there was a growing international sentiment, particularly after the horrors of the Holocaust, to provide a safe haven for Jewish survivors and establish a Jewish homeland. This sentiment, combined with the Zionist movement, which advocated for the establishment of a Jewish state, influenced Britain's decision to facilitate Jewish immigration to Palestine.
It is important to note that these historical events and motivations are subject to interpretation and debate, and various perspectives exist on the matter.