Palestine's international borders were defined by post war treaties just lake all of the other countries in the region.
That is a false point.
Wrong as you have been shown before the borders that are detailed in those treaties include what is now Iraq, Syria, Jordan and Israel. They were done that way to make it easy for the promises made to the arab muslims to be kept, they did not grant the itinerant arab muslim wandering workers a nation as you imply. There are no treaties that define the international borders of lesser Palestine, what there is are borders of the original NATIONAL HOME OF THE JEWs. Then the revised NATIONAL HOME OF THE JEWS that allocated most of the land to an arab Palestinian state known as trans Jordan. Later on the UN partitioned this land into two parts for the muslims and the Jews. This was accepted by the Jews and declined by the muslims and led to the Arab Israeli war of 1948. The ICJ later stated that res 181 was valid and legal stopping the arab LIES once and for all.
No it is a valid point as every other nation created at the same time was done so via signed treaties.