Promoting the values of peace and tolerance within an international climate of turbulence and instability is an essential responsibility for governments and schools. Threats to tolerance include the circumstances of societal challenges, instabilities in the region, and the increasing risks of social media. Ways to nurture and instill tolerance through the subject of Islamic education in UAE high schools is a key concern. Through a case study of the written, taught, and learnt curriculum of UAE Islamic education, this paper investigates the teaching and learning of tolerance in UAE high schools. It provides recommendations on how Islamic education classes, built on an awareness of the Islamic value of tolerance as a foundational component, can be utilized for shaping educational experiences that promote open mindedness. Curriculum-aligned Islamic education resources need to be further developed and teacher professional learning programs should be launched to empower teachers to achieve this intended aim.