Religions and beliefs are complex, contested and challenging aspects of the educational systems and cultural landscapes both in the Republic of Ireland (ROI) and in Northern Ireland (NI); part of a long and protracted history of colonial oppression and political struggles underpinned by religious and ethnic divisions. The deficit in the literature on third-level students' attitudes to religion and belief in the ROI and NI was a springboard to this multi-disciplinary funded research. Perspectives of 900 second-year university initial teacher education (ITE) and social science students, from 6 tertiary educational contexts were explored within an analytical framework provided by the European Values Survey and the European Social Survey for understanding values and beliefs among its citizenry. The research was undertaken to understand students' attitudes to a belief diverse society involving newly arrived immigrant and refugee groups. The authors argue that based on the research findings key issues such as religious or belief bias, and fear of religious or belief other, emerge for student stakeholders which will inform their professional practice(s). Research of this nature is particularly important in the context of Ireland (ROI and NI) where religious diversity has underpinned political turmoil and educational and cultural division in the past.