What did queen Isabella fear?

Queen Isabella of Castile feared the loss of her kingdom's unity and stability, particularly in the face of internal strife and external threats. She was concerned about the influence of rival factions and the potential for civil unrest. Additionally, her ambitions for a unified Spain and the spread of Christianity led her to fear the challenges posed by religious diversity, particularly from Jews and Muslims, which culminated in the establishment of the Spanish Inquisition.