I have never heard of Spain or Iraq, etc being considered to be historically Jewish. That so many parts of the world do have Jewish history for centuries or thousands of years Is different from them being historically Jewish. They were not founded by Jews, and no Jewish nation was ever created there for people to remember them as being historically Jewish. Kaybhar, in Saudi Arabia could e considered still as historically Jewish for how long they were there and the fact that it has been kept empty since there. Another is aJewish kingdom which existed in Arabia until the 11th century until the Muslims conquered it.