Using the realist and neo-realist theoretical approaches to international Relations, the article highlights the tensions between the realist and the anti-nuclear/peace movements in India and identifies the different perspectives existing within the two groups, and the rationale behind them. Extending the realist and the neo-realist approaches, the article analyses how certain postcolonial (in)securities perceived by the current Bharatiya Janata Party (BJP) government of India, expressed through Hindutva, has further aggravated the tensions between the realist and the anti-nuclear/peace groups. (DSE/DÜI)