The coexistence between Muslims, Jews and Christians was normal during the Middle Ages.
Jews lived in both areas, in harmony with Muslims and Christians.
Despite their consequent struggle, Muslims and Christians have always lived together, since some Christians lived in the Muslim zone.
The interest of the European countries to know the philosophical and scientific works of the Greek and Latin authors, brought by the Arabs, made creation in the Christian Spain of schools of translators. In these schools the three cultures coexisted (Arabs, Jews and Christians). they translated literary texts and treatises of scientists.
The Mozarabs were the Christians who lived in the Islamic zone. when they went against Muslim laws and practiced another religion they had to pay taxes.
Medieval Spain has often been presented as a peaceful coexistence between cultures. but not always has this harmony been, since one of these cultures always dominated so there have been revolts and episodes of violence between them.
The final breakdown of harmony occurred in the s. xiv, ending with the expulsion of the Jews in 1492.