IntroductionConspiracy theories and beliefs (CTBs) about LGBTQ+ people are often used as arguments in political debate in Italy and across Europe to hinder the passing of protective laws and negatively affect popular consensus regarding the promotion of anti-discrimination policies and the advancement of civil rights.MethodWe conducted two correlational studies in Italy starting the data collection at the end of 2022. In Study 1 (N = 589), we investigated which ideological profile was more associated with LGBTQ+ CTBs, between the two profiles identified by Duckitt et al.’s model (Journal of Personality and Social Psychology, 83(1), 75–93, 2002): path A) high vision of the world as a competitive jungle and consequent high social dominance orientation; path B) high vision of the world as dangerous and consequent high right-wing authoritarianism. In Study 2 (N = 1581), we have also included three potential outcomes associated with LGBTQ+ CTBs in the model.ResultsThrough a mediational path model, we found that path B was the strongest associated with LGBTQ+ CTBs. We found that LGBTQ+ CTBs mediated the relationships between the two ideological dispositions and (a) lower support to LGBTQ+ civil rights; (b) lower LGBTQ+ collective action intentions; and (c) higher adherence to economic myths about LGBTQ+ people.ConclusionsSocio-psychological research on LGBTQ+ CTBs may inform social policies that work to lessen the harm these beliefs do and advance a more welcoming and inclusive society.Policy ImplicationsSuch results offer several insights to change and improve the actual debate in political, scientific, and cultural domains, contributing to producing new policies which might increase the self-determination of all LGBTQ+ people.