Last week a Muslim employee of the Paris police, Mickael Harpon, stabbed four of his coworkers to death in the offices where he had worked for years. After initially issuing the usual claims that Harpon’s motive was unclear and that he had no connection to Islamic jihad terror, French authorities admitted that Harpon had a long track record of arousing suspicion about his jihadi sentiments. But nothing was done. And the fault of that lies squarely at the feet of the Left.

French President Emmanuel Macron said that it was “inconceivable and unacceptable” that Harpon was able to perpetrate a jihad massacre “in the very place where we pursue terrorists and criminals.” But it wasn’t really inconceivable at all, and in modern-day France, after Macron and his colleagues finish thundering their denunciations, such attacks are unlikely to remain in any genuine sense unacceptable.

How was this able to happen in the very place you supposedly pursue terrorists and criminals, Mr. Macron? The answer is all too simple. According to French Interior Minister Christophe Castaner, Harpon “had caused alarm among his colleagues as far back as 2015, when he defended the massacre of 12 people at the Charlie Hebdo newspaper by two brothers vowing allegiance to al-Qaeda.” What’s more, Harpon “had begun wearing traditional Islamic garments for mosque visits, and had started refusing ‘certain kinds of contact with women.’”