With widespread media coverage of religious 'extremism', there is a great deal of interest in how religious identities and principles of tolerance -- or intolerance -- are learned and manifested. The current study investigates the extent to which high school Islamic Education textbooks reflect Islamic religious tolerance, and how this topic presented. A content analysis for religious-tolerance topics was conducted in the Islamic Education textbooks in Kuwaiti high schools; the results show that tolerance is mentioned much more often than intolerance, but there is still room for improvement.