Also worth pointing out here is that this was already the second partition of Mandatory Palestine: the first was in 1922, when the territory was divided at the Jordan River, with everything east of the river (Transjordan) reserved for Arabs only and closed to Jews. That doesn’t mean west of the river was reserved for Jews, though: that area (“from the river to the sea”) remained mixed, Arabs and Jews together.

So the Arabs of Palestine (they didn’t yet call themselves “Palestinians”) already controlled something like 80% of the original territory, but refused to tolerate Jews in the remaining 20%. 1947 was a partition of a partition.