The Manchester massacre underscores complaints from counter-terrorism analysts that Europe has fallen into denial about the threat of Islamic terrorism. For instance, London Mayor Sadiq Khan is on record as saying terrorism is “part and parcel” of urban life. Furthermore, London police said in March that they could not assign a motive to a vehicle attack in which a Muslim British citizen followed the Islamic State tactical playbook by driving an SUV over pedestrians on crowded Westminster Bridge. After the Brussels airport/subway bomb attacks in March 2016, U.S. officials said the Belgian capital was behind the times in basic intelligence-sharing.
http://www.washingtontimes.com/news/2017/may/23/manchester-bombing-reveals-europes-denial-of-islam/