This is a complex subject but, I will try my best to explain.
One of the reasons has to do with religion, the other territorial.
The first reason is religious. According to The Bible and other religious text, God made a promise to Abrahan of a blessing. It consisted of multiplying his inheritance like the gains of sand on the seas, and that his descendants would inherit the kingdom of the heavens.
Sara was the name of Abraham's wife, and she gave him a son by the name of Isaac. Agar war Sara's slave that became Abraham's concubine and had a son by the name of Ismael.
God promise that both will be blessed, according to religious writings.
Jews believe that the promise was for Isaac, because he was the son of Sara, the legitimate wife. That they are the descendants of Isaac the son of Sara, because hi was the son of the legitimate wife, and therefore are the recipients of the promise. Also that the promise was made directly to Sara by God's angel. Which by the way is also what Christians believe.
Muslims on the other hand, believe that the promise was for Ismael, the son of Agar, because he was the first born. According to tradition the first born is the receiver of the inheritance. Also that God's angel spoke of the promise directly to Agar in the dessert. That they are descendants of Ismael the son of Agar, and therefore the recipients of the promise.
The second reason is territorial. The ancient Roman legions inflicted a genocide of the Jews in 70 AD. Due in part to the indomitable spirit of the people of Israel, that despised the Roman rule, and created an unstable control in the region.
According to the historian Josephus: "Josephus claims that 1,100,000 people were killed during the siege of Israel, of which a majority were Jewish, and that 97,000 were captured and enslaved."[4]
Those who survived where taken captive and sent to Rome to serve as slaves.
Many fled to other Mediterranean countries; such as Egypt, Turkey, Spain
(then Iberia) , Syria Jordan, North of Africa, France (then Gaul), Greece, Cyprus, Crimea, etc.
After the genocide, the Romans introduced people from different surrounding nations, (mostly Arabic) and called the area, Palestine.
If you want further information about this go to Wikipedia under:
"Siege of Jerusalem (70)".
The Jews believe the land was given to them by God through Moses, when they escape from the ancient Egyptian (Pharaohs) rule, and have God given right. The Palestinian believe they have been there for thousands of years, that they are the rightful owners of the land, and are bitter to be taken from their land.
Hence, these two events are still today the major reasons of conflict between Israel, Palestine and other (Muslim) Arabic nations.
1) They both believe to be the descendants of the son of the promise made to Abraham by God, and therefore have the right to the kingdom of the heavens.
2) They both believe to be the rightful owners of the land due to historic events.
I believe that both have a certain degree of truth in their point of view. However, I believe the two should live together in harmony and share their homeland together. As far as religion is concern, I wont comment on the subject.
I hope this is useful, you could make further research on the subject.
a fight between the Christians and the Muslims over Jerusalem (their holy land).
That would be the Crusades.
Christians
Christians
JERUSALEM was a holy city hotly contested between Muslims and Christians during the centuries of the Crusades.
Who should own Jerusalem & other places in the Holy Land.
The Crusades were a series of religious wars primarily between Christians from Western Europe and Muslims in the Middle East, starting in the 11th century. There were multiple Crusades, with various objectives and participants, but the main conflict was between Christians and Muslims over control of Holy Land sites like Jerusalem.
Civil war erupted in Lebanon on April 13, 1975. The conflict was between the Sunni Muslims of the coasts, the Shia Muslims of the south, and the Maronite Christians who ran the government.
There was conflict between Muslims and Christians. There was also much changing of hands as to the person who was in power.
The crusades is not a person it is a holy war between two or more religious. But they were fighting for Jerusalem for different reasons. It was between Muslims and christians.
To try to make a truce between Muslims and Christians in Jerusalem, and cause a rift between Saladin and his brother.
The Crusades heightened religious tensions between Muslims and Christians, leading to long-lasting animosity and hostilities. They deepened the divide between the two faiths and fueled mistrust and conflict that still influences their relationship today.