I can see big words here and alot of complications.
If we went back far before 1940s we will still see is as arabian land.
for as far as the countries were established and their borders as far as i know.
if you asked to go back before that, then lets go back till adam and eve
anyway.
About the Flasha jews.... i think they are the black jews (which is a contradiction to the jewish religion that says a true jew is that of jewish father and mother and as they are Sons of SAM, like arabs) They should be no true black jewish....
This might sounds wierd that i'm saying that, but they themselves belive in it but doesn't reveal it that much as they need manpower and need support from all the people so they wouldn't publicize it but t hey belive in it.
Example is that they didn't allow visas for the black jews (Flasha) from Eithiopia and other african countries except after things went really bad with palstinians and they wanted cheap labour... so as jews.... they allowed the Flasha jews to join their so called "promissed land"
cheers, i might be wrong about alot of things, i'm not perfect, but these are some thoughts of my knowledge.
cheers