Zionist Jews were not interlopers in Palestine. The creation of the Jewish state was not an "original sin" foisted upon the Arab world. The tragic flight of the Palestinian refugees was overwhelmingly not the fault of the Zionists. To the contrary, at every momentous junction the Zionists opted for compromise and peace, the Arabs for intransigence and belligerency.
This, in summary, is how most people once understood the Arab-Israel conflict. Today, however, as Israel marks its Independence Day, an entire generation has come to maturity believing a diametrically opposite "narrative": namely, that the troubles persist because of West Bank settlements, because of Israeli building in east Jerusalem, because of the security barrier, because of heavy-handed Israeli militarism-in brief, because of a racist Zionist imperialism whose roots stretch back to 1948 and beyond.
Read more or the interview with Efraim Karsh, "1948: Palestine Betrayed".