This study investigated the relationships between negative attitudes towards homosexuals and two traditional ideologies: religiosity and nationalism, and explored the link with attachment style. An Internet survey yielded 290 participants, of highly diverse ages, nationalities, and religious backgrounds. The participants provided demographic details, and completed measures of adult attachment, nationalism, religiosity, and both explicit and implicit measures of homonegativity. The results indicated that both nationalism and religiosity were highly significant predictors of homonegativity. In the religious group, homonegativity and religiosity were positively related. This finding was greater for less securely attached individuals. Avoidance moderated the relationship in religious females, while anxiety moderated the relationship in religious males. No significant attachment moderation was found between the nationalism-homonegativity relationships.