Dipshit. Palestine is primarily a REGION with a group of people that have a similar ethnic/religious/nationalistic identity. They have been there since before the Ottomans and many are the current descendants of the tribes of the region.
When the Ottoman empire collapsed the land was given to Britain, who had an interest in creating a "Jewish homeland" motivated by Zionist pushing and tendencies/sympathy. The affair was never formally settled, with the Arab native inhabitants desiring independence or to join a greater pan-arab state. Britain never allowed it, besides some confusion from a certain McMahon.
After WW2 there was a significant displacement of Europe's Jewish population, and unfortunately nobody in Europe wanted them. So the drive for a Jewish state (out of Europe) skyrocketed. And without concern for the people who already inhabited the area, they inserted the Jewish people and declared Israel to have dominion over the area.
Now, obviously this bothered the Arabs. Pissed off lots of mudslimes. Since that time, war has frequently broken out, due in part to Israeli disregard for the Arab population and forced relocation of them. Then the famous Israeli colonization commences.