This paper investigated Finnish youth's perceptions on what supports or prevents understanding between people holding different worldviews, especially religious and non-religious ones. A survey using projective, open-ended questions was conducted examining factors that enhance or damage inter-worldview dialogue among Finnish lower secondary school students (N = 563). The data was analysed using qualitative content analysis. Abu-Nimer's developmental model of interreligious sensitivity was used as a theoretical framework, but data-driven categories were also created. First, pupils thought of reasons why somebody would wish that religions did not exist. Four categories were created: atheism, confusion about religious expressions, problems related to one's own worldview, or problems in social interaction. Second, pupils reflected on why somebody would be reluctant to share things about his/her faith. The most important feature addressed here was social deviance, either fear of it or its consequences or actual experiences. Third, pupils suggested ways to create a culture of peaceful dialogue. Most responses referred to changes in attitudes or different kinds of social interaction.