Palestine was the Roman Empires name for Judea as of 135AD. It has absolutely nothing to do with Arabs or Muslims. The Koran mentions the Holy Land as an alternative name for Israel.
The Palestine Mandate recognises Jews and non-Jews. No 'Palestinians'.
Not until 1964 at the instigation of the KGB did the Islamofascist jihadist terrorists rebrand themselves as Palestinians with a false back history.