The murder of an elderly priest celebrating a Catholic Mass in Normandy had been the last straw for France, a country that had seen more extremist militant attacks than the rest of Europe from 2015 to 2016.
In the French Riviera city of Cannes, large backpacks on beaches that is automatically speculated as carrying explosives has been decreed by the Mayor as illegal.
In Britain, extra security for key sites and high-risk events see larger funding.
Churches of all beliefs had begun increasing their security. The Jewish group of the Community Security Trust provides extensive protection to Jewish Synagogues and Schools throughout Britain.
About three attacks in France and four in Germany the extremist group Islamic State had claimed as their doing. They believe the two countries are part of the “crusader” west in Europe.
In France, hundreds had died from IS-claimed attacks including Nice and several events that saw simultaneous bombings in different locations.
“Today, no commune in France is safe,” Mayor Jean-Claude Charvin said in a statement on the town’s website. “Each day, the government says ‘We’re at war’ … (it) must give small towns the means to protect their citizens.”
The head of the Finsbury Park Mosque in London, which has distanced itself from extremism since being associated with it in the 1990s, says “extra measures to be careful” are being added to its closed circuit TV cameras and security guards.
“We are all now under threat,” Mohammed Kozbar said.