How the suspect, from a broadly secular background with a history of petty crime, was transformed into an alleged cog within extensive Islamic State cells operating in Belgium and France is unclear.
Terrorism is not a new phenomenon for France, but the 2015 attacks became a tipping point.
"It's a disgusting act of aggression," the mayor of Levallois-Perret said.
The gunman, identified as Karim Cheurfi, opened fire on a police vehicle parked on the Champs Elysees in Paris late on Thursday, killing one officer and injuring two others before being shot dead.
The individual cried out "Allahu Akbar" and police believe he wanted to carry out a terrorist attack.
No soldiers were wounded in the incident.
“ISIS wants to change the subject from Mosul and its failures in Iraq and Syria.”
There are over 100 guns per 100 US residents, more than twice the figure for Switzerland and three times that for Austria, Germany and France.
The West currently treats Muslim “grievances” as rational. Thus the extremists seem to come from nowhere. They do not.
The petition, signed by dozens of academics and celebrities, appeared Sunday in the Journal de Dimanche under the title “We, French-Muslims, are ready to assume our responsibilities.”