Staga,
Do you mean the so-called Palestinians? Be specific.
Are you referring to those whose ancestors lived there peaceably with Hassidic Jews for hundreds of years? Or are you referring to the groups of "Palestinians" who wandered into the area during the upheaval accompanying the break-up of the Turkish Empire...which consisted of Turks, Syrians, Iranians, and a dozen other ethnic groups that were not native to Palestine? These wanderers came to the area hungry for land and settled here during the British Mandate...and almost immediately began vieing for the land with Diaspora Jews who began to return to the area in the early 1900's.
Even today the Israelis have few problems from the Palestinians descended from the long-time residents of the land. The "Palestinians" who fled Israel after its formation, and who wandered the Mediterranean region with Arafat for decades, were those who believed the promises of the murderous Grand Mufti of Jerusalem, who said that after the fighting was over they could return and have all the Jews land for themselves.
The only problem was, the Israelis did not lose that war...and these "refugees" were rendered landless and homeless. They could have been taken in by any number of other Muslim nations in the Middle East and the Mediterranean, but nobody wanted them on a permanent basis. Harboring a bitter hatred of the Israelis, they turned to wanton acts of terrorism.
Before you shed too many tears for them you would do well to remember that in the period after WWI there were prominent Muslim moderates who supported the establishment of a Jewish homeland. They were murdered or intimidated by Arab radicals, led by the Grand Mufti of Jerusalem who spent World War II as a guest of Hitler, for he had been run out of Palestine at the insistence of moderate Arab leaders. He helped organize an SS unit composed of east European Muslims. Wearing a fez to distinguish themselves from other SS units, this group of thugs killed hundreds of thousands of Christians and Jews in Yugoslavia. The hatred they generated remains until the present time. The "ethnic cleansings" that took place in the early 1990s in that region stems, in part, from those events.
The leader of that group, the aforesaid Grand Mufti of Jerusalem, played a large part in the establishment of Nazi-style governments in the Middle East, complete with gestapo style secret-police and racial hatred.