You're comparing accidents to first degree murder committed with a vehicle.
I'm not comparing the perpetrators, I'm comparing the effects on the victims.
Being run over by a car kills one just as dead when it was an accident. In fact, every year it kills 3500+ people in France, roughly 1500 of which would still be alive if the French were driving as carefully as the British. The average number of terrorism victims is a couple orders of magnitude below even that lower figure.
Accident or murder doesn't change the fact that terrorism is one of the last things anyone in France, local or tourist, who is worried about their safety should spend much time thinking about. Pretending otherwise is playing by the terrorists' book - to be feared way out of proportion to their actual capacity to inflict harm, and to further divide the French population, are two of their top goals!
Then I guess we shouldn't care about murder because it doesn't kill anywhere near as many as cancer.
But somehow I think you only are saying we shouldn't care about murder by jihadis.