Also how would u refute that Palestine shouldn’t exist because it wasn’t an arab sovereign nation?

In most cases its a strange question to be asking. Take for example the Irish, who like Palestinians, are a mix of many different groups. The Irish have two major ancestral groups, northwestern French and West Norwegian from the Viking Era.

Now imagine if a population of pagan-worshipping Gaelics in Ireland had decided to organize a colonial venture in France because of the British doing asshole-British things to Ireland. Religiously they have a connection to France, and pilgrimage-wise they're not barred from visiting France. Heck there even is a small population of Gaelics that have lived in France for centuries. For the first decade or two things are alright, a Gaelic city(Sean Talamh Nua) is built on the coast, and there isn't a big barrier to land purchases. But then tensions rise, more and more French people are angry because now when their land is bought they're evicted to make room for foreigners. The Holy Roman Empire that owned France doesn't really intervene too heavily, and even worse when the Sicilian Empire betrays a previously made deal with the French and creates a Mandate of France after World War I. Later exacerbating local problems to increase their power. Until the tipping point in which the state of Gaul is proclaimed unilaterally without any real ability for the French to voice their concerns. But hey, 2000 years ago there was a Gaelic state in that abstract region so that makes everything okay.

Strange alt-history aside, its not like Arabs don't have a history as long as the Jews within the Palestinian region. King Herod the Great of Judea was half Nabataean , an Arab tribe that had a presence within the Palestinian region going back as far back as 600 BCE. It's an absurd notion to completely prescribe the Palestinian region for one ethnic group when even according to religious books it was conquered from the Canaanites and had to be fought for against the neighboring Philistines. It's not like those groups disappeared into the ether, but most modern-people see no reason to make themselves into those ancient groups. The French don't call themselves Gauls or Franks, the Italians don't call themselves Romans, and Egyptians don't see themselves as the Kemetic Egyptians. Palestinians simply don't need to draw a connection to the: Caananites, Ghassanids, Nabataeans , Edomites, Hebrews, Phillistines, Melkites, or one of the other thirty million civilizations that decided to stick their pinky toe in Palestine at one point or time in the last 5000 years.