You are making that up about Paris voters, with not one iota of evidence to back it up,  Not one.

They massively rejected Le Pen during the first round, too - when they had many choices.  Of the city's 20 arrondissements, Macron won 13, Fillon 5, and Mélenchon 2. Le Pen won 0, and came in fifth overall - with 7,51% of the vote.

In the second round, the highest vote she got in any of the 20 arrondissments - which vary widely in class, income, ethnic background - was 12%.

Perhaps the most obvious conclusion is the best one - as people who had faced the most terrorist activity, they had a very good opinion opinions on whose approach was the best to deal with it.  They've known Le Pen for some time, and it definitely wasn't her.