Jews benefited, as did Christians and Moslems. The North African Islamofascist dictators actually invaded Spain once to straighten out the Moslems and bring them back into conformance with Islamic law.
I referred to it above ~ but there was even a custom, with laws, governing "forced conversions" ~ and I'd guess the new local prince would make some decisions on the basis of whether or not he liked ham and eggs for breakfast.
By the time Ferdinand and isabella wrapped up the Reconquista most of the hard part had been done and people were "converted" according to law ~ with the Jews still having an exceptional status because they'd been prohibited entry into the mainstreams of Spanish society for hundreds of years.
The final forced conversion (or expulsion) was probably more of an afterthought about straightening out the kingdom than anything done in anger.
To a degree it was progressive in the sense it did offer Jews a way to enter Spanish society ~ which was shortly to become the wealthiest and most powerful on Earth!