And it isn't a good example given the driver wasn't an "imported terrorist"
Not an invalid point that Europe has been importing some terrorists since libya, syria and a few other countries fell into chaos. Which countries funded, promoted and held arms and military interventions that ultimately caused such chaos btw?
To your point there could have have been riots, yes, why not. What was the police doing, too busy writing traffic tickets instead of working on preventing more serious threats? What were public servants doing for the city of Nice and its social total disymetry, just take a good look at the wealth on the rivera yet masses are on minimum wages asked to pay 1000 euro for a tiny apartment.
There can't be any acceptable reason to run over anyone, but 86 people in their graves isn't a reason to implement a law which down the road would lead to even more murders which of course had a gooe chande to trigger what we've seen this last week.