If you are referring to the Golden Age of Islamic Spain (800s-1000s), the Muslims were in power at that time, so they treated themselves quite well. The Jews and Christians were treated as second-class citizens in what would today be called apartheid, but what was at that time rather tolerant.
Citizens of Spain are Spanish.
People who were not Jews were treated differently than the Jews in Nazi Germany. Some of the Jews were German citizens but they were treated as Jews.
fine
Not good
They were treated as subordiante or second-class citizens.
Christians are treated just fine in Spain. It has been a Christian country for mor than 1000 years.
citizens
Not so good.
he was treated very well when he returned to Spain.
Yes.
sometimes