Palestine was a province of Syria as noted by Herodotus in 500 BC. Who ruled in 500 BC? Palestine and trans Jordan were occupied by Arabs. Jews were a tiny minority. You weren't satisfied with the land you were given or the neverending foreign aidThe region was called Syria Palestine. To insult and humiliate the Jews and make them forget their homeland. It did not work.
The British named the Mandate Palestine to insult the Jews, as the Romans had done. They never meant for the Jews to actually rebuild their nation on their ancient homeland, giving 78% of it to the Hashemites.