I dont subscribe to right wing settler rhetoric about 'Jordan is Palestine'. But from an historical perspective, both Israel and Jordan formed the British Mandate of Palestine. Having promised a homeland for both Jews and Arabs in Palestine, the British handed over 80% of the landmass, all located to the east of the Jordan River and formed the Arab only Kingdom of TransJordan, later just Jordan. This action in 1922 left just 20% of Palestine (now Israel and the territories from which to create two more states. Had British not created Jordan when it did, the creation of a small Jewish state with the Mandate might have been less of an issue for the Arab world, assuming Jerusalem could have had shared sovereignty.
from the article: Rebel spokesman to Haaretz: Libya needs world's help, including Israel's