Boko Haram insurgency in Nigeria has been widely discussed on the Internet. Studies on these discussions have been grossly limited. This study, therefore, examines linguistic and discourse patterns in reader-comments on/in news and articles on the insurgency in e-newspapers in order to measure the viability of the Internet in engendering group discussions on the insurgency, examine the influence of media representation of the insurgency on the readers, and access readers' socio-cognitive processing on/of the insurgency. For this study, reader-comments on news and articles on the insurgency are purposively selected from the official websites of five newspapers (The Punch, Vanguard, Premium Times, Leadership, and Sahara Reporters) from the three regions in Nigeria. The analyses are conducted using Exchange Generative Model derived from systemic functional linguistics, media discourse analysis, cognitive discourse analysis, and argumentation models. This study will unveil the mental configurations of the insurgency through mediated interactions.