What situation that arose in palestine in the late 1800's is still a source of conflict today?

In the late 1800s, the rise of Jewish nationalism, particularly through the Zionist movement, led to increased Jewish Immigration to Palestine, then part of the Ottoman Empire. This influx created tensions with the Arab population, who viewed it as a direct threat to their land and culture. The conflicting national aspirations of Jews and Arabs laid the groundwork for enduring hostilities, culminating in the Israeli-Palestinian conflict that persists today, marked by disputes over land, governance, and national identity.