The article identifies a political-cultural deficit in the expansive literature of the last 10–15 years on transnational activist communication. To illustrate the utility of a political-cultural sociological approach the article discusses how contemporary jihadist activists, and especially al-Qaeda, have actively transformed the Guantanamo Bay detention camp set up by the United States following the attacks of 9/11 into a transnational injustice symbol. Transnational injustice symbols are events and situations (both past and present) constructed and employed by political actors to condense and perform perceived injustices before geographically, socially and culturally dispersed audiences. Guantanamo Bay and other injustice symbols such as Palestine, Abu Ghraib and the Muhammad cartoons published in Denmark in 2005 are key elements in the creation of a transnational jihadist injustice community.