Why would anyone who can use a keyboard ask such a stupid question?
One simple reason. The Arab world is mentally incapable of recognizing that Israel was settled in a sparsely populated land where Jews bought the land and turned it into a paradise. Those few Jews who accomplished this miracle did so with 20th century Western skills and intelligence.
Because the Arabs, everywhere, live with no skills and no competence and in a paradise only a camel would appreciate, the Arab world must fabricate a reason for their desolate self-inflicted failure.
The fabrication is that the Jews made up the Holocaust as a way to move en mass, with European support to create Israel and drive out the large Arab population.
Piling fabrication on top of blindness is the Arab Way. Anything to save face.