Step-by-step explanation:
As the result of WWII and Holocaust Israel had 6 millions less of potential repatriates.
And it somehow gets forgotten that in WWII the Arabs joined Hitler. Concentration camps in North Africa are forgotten.
British prevented Jews from entering the Mandatory Palestine, while not preventing from Arabs doing so.
More Arabs in the area and the beginning of building the false narrative of Arabs paying for German sins and European colonizers in the Middle East.