This paper situates the Islamic State's ideological instruction and training documents collected as part of The ISIS Files project within the broader debate between Islamic State scholars over the acceptability of takfir (excommunication). Among other artifacts, the paper examines controversial treatises issued by the Islamic State’s Committee for Research and Fatwas on the legitimate bases for takfir.
Read the paper: https://isisfiles.gwu.edu/concern/reports/70795765b