The Diplomat includes LGBTQ+ characters as part of its diverse ensemble, integrating them into professional narratives. However, the portrayal is significantly undermined by the use of the 'Bury Your Gays' trope for its main queer character and critiques of stereotypical representation, leading to a net negative impact despite intentions for inclusivity.

The show portrays Christianity through a character whose personal faith emphasizes love and character, presenting a nuanced and sympathetic individual perspective. While evangelical Christianity is a political backdrop, the narrative doesn't critique the faith negatively.

Islam is depicted within geopolitical contexts, including a vehicle-ramming attack targeting a Muslim family, which positions the audience to sympathize with victims of bigotry. The narrative explores complex U.S.-Iran relations without portraying Islam itself as inherently problematic.