Is There An "Historic Palestine"?

This is the map which opens up a new Arab propaganda effort, Peace Process 101:-

I left this comment there:-

what "historic Palestine" are you presenting?a) "Palestine" never existed as a state/geopolitical entity.b) up until the British conquest in 1917 it consisted a various villiayets administratively shared by Lebanon, Syria and Turkey. Basically was considered by the Arabs too as a part of Southern Syria.c) Jordan, as TransJordan then, belonged to "Palestine" but was separated in 1922. It was some 70% of "Palestine" as perceived by the League of Nations. You can't leave it out of equation

^