The League of Nations' Palestine Mandate spelled it out pretty clearly: Arabs have property and civil rights but no inherent political rights. (Under Article 80 of the U.N. Charter any U.N. resolutions saying otherwise are garbage.)
Of course by the terms of the Mandate the Jews of Palestine were not to sacrifice their own civil rights to live in peace and security. The Arabs who objected by force or feet to Zionist rule, siding with the invading Arab armies, thus lawfully lost their rights to return to their former property; that was the Ottoman standard, and it was only because the Zionists were merciful that these Arabs did not suffer decimation as well. (And the Arabs who simply drifted into camps pretending to be Palestinians in return for a dole, shelter, and education have even less claim to Israeli territory.)
At the same time, the Jews in other parts of the Middle East were supposed to retain their property and civil rights. That did not happen: the Jews' wealth and property were wantonly seized by local rulers and they were driven out of Egypt, Jordan, Syria, Lebanon, and Iraq. Most of these Jews were shoved into a new Israel lacking infrastructure and Israel was close to starving due to the Arab trade boycott, so they were often settled on top of abandoned Arab villages, given a cow and seed, and told to make do as best they could: Israel narrowly avoided starvation as its population more than doubled in the decade after independence.
Clearly, the injustice suffered by these Jews was far greater than that "suffered" by intolerant Arabs - and the fact you acknowledge no measure of this shows how ill-prepared you are to pass justice on the Israel-Arab conflicts, yes?
So it is that Israel remains 20%+ Arab - the Arabs who didn't revolt retained their civil and property rights - whereas the surrounding states are Judenrein. Israelis, Arab and Jew alike, have spent the decades since independence building their communities and the Jewish State, enjoying freedom and seeking peace and prosperity rather than tyranny and conquest.
So "what about the rights of the Palestinian people to their own land"? They don't have any such rights anymore; their ancestors sacrificed them in fires of murderous hatred. While these Arabs may have a moral claim upon the European and Arab rulers who encouraged their revolt Israel doesn't owe them anything.
THIS narrative, here, that I've just recounted, unlike the one crammed into students' brains by the State of Pakistan, is a narrative that can be supported by facts in context. And once Pakistanis can fearlessly support such a narrative as well as criticize it then they may have a claim to wielding some sort of moral voice. Not before.