This article unveils the Qur'an's perspectives on the erosion of phobia of other religions because of the negative stereotypes attached to Islam and Christianity to create greater peace in religious life globally. Furthermore, the Qur'an's perspective on adult religious morality development is revealed by the at-tafsir al-maudhu'i method (a thematic interpretation). The study shows that adult religious morality development should integrate (1) religious morality (appreciation for faith differences), (2) national morality (love for the state and motherland) and (3) social morality (...) (social integration) to build individual religious maturity to overcome Islamophobia and Christianophobia. Religious maturity renders humbleness, moral consistency, comprehensiveness and heuristic in every individual character. The results of this research are in accordance with Wallport's opinion on religious maturity. CONTRIBUTION: The main contribution of this study is to reveal the insights of the al-Qur'an regarding the solution to the problems of Islamophobia and Christonophobia caused by the stereotypes of Islam and Christianity. In addition to interpreting verses, this study is equipped with psychological studies in building everyone's religious maturity so that they can think and act wisely in respecting differences in beliefs. This study is expected to minimise the problems of Islamophobia and Christianophobia from inside and outside the adherents of these religions. (shrink)