If I was a Muslim, I'd be laughing at how pitiful and weak my enemies are.
If I was President Francois Hollande, I would have gone on TV and said the French Secret Service is going to hunt down and kill every person who even talked to the murderers.
I expect so little of these weaklings that I didn't even stop to consider your suggestion for Hollande. But you are right on that too.
For God's sake, Obama could have come out and said the same thing. But from him---le zéro.