Bad time to say this, but it is true.
The French were big supporters of the PLO along with many other Western nations when they were conducting similar atrocities against Israel.
By ignoring, and by default rewarding, terrorism against Israel, the West emboldened terrorism, and now they find it at their own gates.
The PLO should have been punished for this kind of behavior decades ago. Instead, they were rewarded. And now, here we are.