After years of Islamist terror attacks from Paris to the Riviera that have left hundreds dead, you might think that the French are inured to the fact that they are the jihadists’ favorite target in the Western world. But now…

When you heard Notre Dame was ablaze, did you think Islamic terrorism might be involved? I did. And with the origin of the fire still uncertain, that remains a valid avenue of inquiry. Muslim extremists have attacked the landmark before, have…