Final answer:
The irony in Jews and Arabs being half-brothers lies in their shared ancestry and the historical conflicts arising from it, particularly related to the land and nationhood, which has led to a complex and often adversarial relationship between them.
Step-by-step explanation:
The question touches on the irony of the somewhat fraternal relationship between Jews and Arabs, who are considered half-brothers due to their descent from the biblical patriarch Abraham, a common ancestor in both Judaism and Islam. This irony stems from the historical conflicts over shared ancestry, territory, and the collective memory of both groups in the Middle East. When considering the option provided, the most fitting answer is a) Due to historical conflicts over shared ancestry. The Jews and Arabs have experienced a tumultuous relationship, particularly regarding the land of what was formerly Palestine and now includes the state of Israel and the Occupied Palestinian Territories. This conflict has become a central foreign policy issue, where the creation of an independent Palestinian state alongside Israel is heavily debated.
While both groups indeed originate from the Middle East and have a shared ancestry, the religious, cultural, and historical narratives have shaped a complex and often adversarial dynamism between them. This is further complicated by international factors such as the significant financial and military support Israel receives from the United States, which affects Middle Eastern diplomacy.