Following the 2017 Westminster attack, Hasan wrote an article in "The Intercept" criticising what he referred to as the "common stereotype of the Middle Eastern, Muslim-born terrorist." He pointed out that the perpetrator of the attack, Khalid Masood, was born and raised in the United Kingdom and, therefore, would not have been affected by any immigration ban. He also pointed out that Masood converted to Islam late in life and had a history of criminality prior to his conversion. Hasan concluded, ergo, that while "a distorted, simplistic and politicized form of Islam" provided the justification for Masood's actions, the main motivation lay in "social networks and family ties; issues of identity and belonging; a sense of persecution; mental illness; socio-economic grievances; moral outrage over conflict and torture; a craving for glory and purpose, action and adventure." Hasan also referenced a 2008 leaked report by researchers for MI5, a 2010 Demos study, and a 2016 Egmont study, that came to similar conclusions "challeng[ing] the conventional... wisdom on the role of religion in the radicalization process."