It has been more than 60 years now since the start of the Israel Palestine Conflict.
What I write below is my understanding of the situation, and hence is up for discussions and debate.
If I may permit myself to simplify history and bring out the beginning of the conflict, then it eventually will boil down to the time Nazi's were executing the 'ethnic cleansing' process, compelling the Jews to escape out of Germany in search of a new home, Palestine. Why Palestine? It was because of Jerusalem - which is also the most holy place for Jews. ( If we rewind some more, then I would say Britain played smart -- in 1916 it convinced Arabs to revolt against the Ottoman Empire and then, in 1917 a British Foreign Minister, Lord Arthur Balfour issued a declaration supporting the establishment of 'a Jewish national home in Palestine'. Palestine then was inclusive of what Israel is now.) After world war 2, with support from UN, Israelis occupied a large portion of the land of the Arabs and called it Israel -- even when Jews were a minority population there, they were given majority of the land. (Israelis (Jews) most often got special consideration because of the horrendous crimes committed against them during the reign of Hitler). Hence after the partition and proclamation of Israel in 1948, what was left of the Palestine was essentially the Gaza strip and the west banks and a totally dissatisfied and cheated Arab population who clearly rejected the partition of Palestine and the existence of Israel. In addition to this, the other issues include the internationalization of Jerusalem - which was promised by UN but never really done and also driving out the Palestinians from Israel into refugee camps (there are thousands of Palestinians who have been born, grown up and died/killed in refugee camps).
Have more to write on this.. will continue in the next post soon.