The Holy Land is a very complex issue mixed with religion, politics, and money. Everyone wants that small piece of land. Millions of people travel there to visit pilgrimage sites. Judaism, Islam, and Christianity all make their home in the Holy Land.
Both Israel and Palestinians believe that it is their land, and they are entitled to it.
Last I heard, the US gives four billion dollars each year to Israel. The Palestinians are poor people living in the areas called the West Bank. There is a huge wall built to divide the two.
As long as they have the entitlement mentality, there will never be peace.