I can see now how you've become confused. You have posted a ' map ' of Palestine. That isn't a map of any proposed Jewish homeland, it's a ' map' of the country wherein any Jewish homeland could be located. Understandable mistake- no need to apologize.
For the avoidance of any doubt- here is the actual map of British mandated Palestine as partitioned by UNGAR 181 in 1947 to provide discreet territories for both European refugee Jews and indigenous Palestinians;
As is clear from the map- the area ascribed to the indigenous Palestinians is smaller than the other- even though it was the Palestinians' country which was being divided. Arab states opposed it- but it was passed anyway- and that's how the dumb British brought down today's Middle East wars upon us all.