It took Israel security services around 3 years, to stop most bombing and rifle attacks. They are better funded and staffed (forced conscription larger in scope than in France) and that didn't help either . Eventually a massive wall was built (ideologically neither party supported, which gave rise to opportunistic and most corrupt politicians) and as enough of the voters didnt approve with the results the army got approval for countless ground and air raids. The end result was a young generation filled with hatered torwards Israel, now finding other ways to attack.
My point is that to expect security forces to stop such attacks is reasonable up to a point. Escelation on one side builds escelation on the other and eventually its becomes an established norm. The problem Europe has is real, and difficult, tragic.
My heart is with those in Paris, France and Europe .
I cannot sleep.