Your claim, is ignorantly absurd.
See the updated 1968 Charter for the Palestine Liberation Organization:
https://avalon.law.yale.edu/20th_century/plocov.asp
Article 1:
Palestine is the homeland of the Arab Palestinian people; it is an indivisible part of the Arab homeland, and the Palestinian people are an integral part of the Arab nation.
Article 2:
Palestine, with the boundaries it had during the British Mandate, is an indivisible territorial unit.
Article 3:
The Palestinian Arab people possess the legal right to their homeland and have the right to determine their destiny after achieving the liberation of their country in accordance with their wishes and entirely of their own accord and will.
Article 4:
The Palestinian identity is a genuine, essential, and inherent characteristic; it is transmitted from parents to children. The Zionist occupation and the dispersal of the Palestinian Arab people, through the disasters which befell them, do not make them lose their Palestinian identity and their membership in the Palestinian community, nor do they negate them.
Article 5:
The Palestinians are those Arab nationals who, until 1947, normally resided in Palestine regardless of whether they were evicted from it or have stayed there. Anyone born, after that date, of a Palestinian father - whether inside Palestine or outside it - is also a Palestinian.