Did you read the article? The author states that "[in] the longer run, profound discussions about the root causes of terrorism including alienation, interpretations of Islam, Islamophobia, western foreign policy, problems around integration, and many others will need to occur." Are these not the standard excuses we hear about after every attack? PM May essentially rejected this victim-response thesis in her comments about yesterday's attacks, stating that one of the basic problems is the failure of the communities/cultures from which the terrorists are emerging or to which they're attaching themselves to accept  the value of pluralism. Integration, after all, is a two-way street.