The Mandate for Palestine included Jordan also. Which is 80% of the land. It also included Golan and S.Lebanon.THIS is what Palestine was, and what it should've remained - half Jewish, half Arab, with a U.N.-administered Jerusalem.
Res 181 a non-binding Un resolution called for a vote by Jerusalem residents after a decade or so. Jews were 2/3 of Jerusalem so we all know what the vote would have led to.
The Arabs turned down peace a dozen times already choosing violence instead as a policy.