While France wants to change the way the Eurozone is run, it has difficulties in persuading Germany
Throughout much of the EU's history, a strong alliance between France and Germany has been a necessary, though not sufficient condition for European integration. They hold fundamentally different views on many issues, which means when they have found a compromise, their partners usually follow. In this century, however, the tandem has lost its force. The EU's eastern enlargement reduced the relative weight of France and Germany.
It is the same conversation after each attack. A similar massacre could have easily happened outside the stadium during the Paris terrorist attack of November 2015. It is the same story. A suicide attacker cannot be stopped. Whenever 20,000 people enter or exit a stadium, a concert hall, a crowd will form at the entrance, on the streets in front. A suicide bomber is bound to kill or injure at least a hundred people.