the establishment in Palestine of a national home for the Jewish people
Note - no mention of 'Palestine' 'including' a national home for the Jewish people.
Sorry, but this claim won't fly.
What the author is attempting to say is that Palestine was intended to be "a national home for the Jewish people."
If this were the case, the second quote above would have said something like "the establishment of Palestine as a national home for the Jewish people."
But that isn't what it says, is it?
The claim that the mandate gave 90% of Palestine to the Hashemites is also untrue. Mathematically, the numbers are off. Historically, what is now Jordan was never part of a "Palestine" to be divided. It was simply another part of the Ottoman Empire that was handed over to British control based on secret treaties, just as what is now Iraq was.
Correction, headline doesn’t claim 90% of Palestine was given away. I misread it. Apologies.