1). What nation was disenfranchised when Israel captured Gaza in 1967, defending against multiple Arab states? Here we are exposed to Israel's challenge against charges of an illegal occupation, or occupation at all. It's an argument termed "missing sovereign". There was no sovereign state following the dissolution of the Ottoman Empire - nor since - to claim injury. There was no Palestinian government signatory regarding cessation of hostilities, or to ensure a mutual security agreement.
2) Until Israel declared independence May 14, 1948, there was no Israeli government and no Jewish military. There were Jewish militias - Irgun, Lehi, Stern, Haganah the most notable - referred to by the Arabs as 'gangs'. A population of 700K Jews was immediately attacked the next day by Arab nations numbering 40 million citizens.
Nakba, the "running off of 750,000 or so Arabs": while I think the whole presentation worth a listen, 5:50 - 16:00 speaks to the assertion of purging the Arabs, as recounted by Jewish Palestinians and Arab Palestinians. It is particularly noteworthy because it takes a look at the highly publicized militia action at the town of Deir Yassin, and causative effect on Arab flight from Palestine. It has been described as a 'massacre' and in isolation and without reference, I'd agree. That's the problem, however. The Arab-Israeli war began with the UN announcement of partition on November 29, 1947. Arab forces began rioting and waging attacks just as problematic as Deir Yassin.
Jerusalem had been cut off from all aid for about 6 months, and there began execution of a plan to reach them. Previous attempts had been stopped by attacks from roadside villages. Deir Yassin does not appear to have been one of those blockading towns and I'm not clear why it was selected for clearing, but it was. In the end, 100-110 villagers were killed, 4 Jewish militia members, and 45 or so wounded militia. Only the fringe do not acknowledge this would fit the description of war crime. Jews from a nearby village interceded forcefully, stopping the killing.
As depicted by Hazem Nusseibeh/Palestine Broadcasting Service, the decision was to make Deir Yassin a propaganda centerpiece of utmost embellishment. The desired effect was to draw Arab nations into the conflict full-force, but as he notes it was their greatest mistake. As word of the inflated incident spread like wildfire via Arab news agencies - with false rape allegations being highlighted by the Arab contributors as a specific driver - Arabs exponentially fled in higher numbers. He states they did not anticipate how our people would react, they fled all our villages. .
In addition, Mahmoud Abbas alluded to Arab leaders encouraging - even forced - Arabs to leave, that they might return in a matter of days or weeks, once the Jew was erased. And that an absence of fellow Arabs would make this easier. This is often dismissed as Israeli propaganda, but Abbas clearly states otherwise in a column for the official PLO journal Falastin al-Thawra in March 1976, writing "The Arab armies entered Palestine to protect the Palestinians from the Zionist tyranny but, instead, they abandoned them, forced them to emigrate and to leave their homeland, imposed upon them a political and ideological blockade and threw them into prisons similar to the ghettos in which the Jews used to live in Eastern Europe".
I haven't looked at the claim that Jewish officials encouraged Arabs NOT to leave their homes.
And - they're just Arabs, like Jordanians, Egyptians, etc. Not even Hamas is fighting for 'a Palestinian homeland' but just more Arab land for all Arabs. The original mandate 1920 called for TransJordan to be part of Palestine and the Jewish homeland because it originally was. That was removed by Churchill in 1921.
Lastly on this note, even among 'Zionists' there were leaders who espoused living alongside the Arab; many of these were either/both religious or socialists. Even among some Arabs there were/are some who espouse the same. It's beyond me to quantify them.