Bangladesh is a secular democracy with almost 90% of its population constituting of Muslims and the rest 10% constituting of the minority groups that includes Hindus, Christians, Buddhists, Ahmadi Muslims, Shia, Sufi, LGBT groups and Atheists. In recent years, Bangladesh has experienced an increase in attacks by religious extremist groups, such as IS and AQIS affiliates, hate-groups and politically motivated violence. Attacks have also become indiscriminate, with assailants targeting a wide variety of individuals, including religious minorities and foreigners. According to the telecoms regulator, the number of internet users in Bangladesh now stands at over 66.8 million reaching 41% penetration. Of them, 63 million access the internet through mobile phones. Facebook, with the usage of about 97.2%, is the most used social network in Bangladesh. In this research, local academics with cultural expertise collaborated to locate and download content from 292 Facebook groups organized under three (3) major umbrella types: Religious Terrorist Violence, Political Intolerance and Issue, and Target-based Intolerance between June2016 - December 2016 period. Dates of real extremist attacks were aligned with corresponding Facebook message streams, identified posts and comments related to the targets and perpetrators of the attacks, and proceeded to use the context of the attacks, their effects, the nature and structure of underlying extremist and counter-violent extremist networks, to study the narratives and trends over time.