Nowhere did I say they "originate" from Spain. Obviously the Jewish people originated from the Land of Israel in the Southern Levant. After the Roman conquest of Judaea[1] begins the diaspora and those we now call Sephardic migrated to Spain and Portugal. They were there for a good 1,700 years before being expelled. I think that's sufficiently long enough to consider them Iberian. Historians do as well. This is actually widely accepted. Further it only makes sense to consider the names Sephardic, Ashkenazic and Mizrahi from the point of the diaspora forward. Those names literally would not exist without the diaspora. Your comment makes no sense historically or otherwise. It's also very bizarre that that you write "Arab/Muslim/Persian" to denote different geographical distinctions when only one of those things is.

[1] https://en.wikipedia.org/wiki/History_of_the_Jews_in_Spain