Nov. 13, 2015, has already gone down as the darkest day in French history since World War II, when 130 people were killed here in an Islamic State assault on daily life: a concert, a soccer game and cafes.

The attack on Paris’s Bataclan concert hall — where 90 of the victims died — and several restaurants in a young, lively neighborhood was only the beginning. In the 12 months since, the same terrorist cell behind the Nov. 13 attacks also struck a Brussels subway and airport, and a lone wolf inspired by the Islamic State, also known as ISIS, drove a truck through crowds gathered in Nice, France, during a national holiday.

Another lone-wolf attacker murdered a French police officer and his partner in the presence of the couple’s 3-year-old child, live-streaming the gruesome incident on Facebook. Little more than a month later, two other attackers slit the throat of an 85-year-old village priest, in the middle of a weekday mass. In almost every case, the attackers were fellow French or European passport-holders content to murder their fellow citizens.

[A year after Paris attacks, Europe’s extremism problem shows no signs of going away]

These assaults by homegrown terrorists have created a backlash against Muslims — France’s largest minority group — that views them as a threat to national security and strikes at the heart of one of the nation’s most sacred virtues: the ideal of fraternity.

1 of 74 Full Screen Autoplay Close The attacks Skip Ad × The deadly Paris attacks in 2015 View Photos More than 120 died in a coordinated terrorist assault across the French capital on Nov. 13, 2015. Caption More than 120 died in a coordinated terrorist assault across the French capital on Nov. 13, 2015. An undated handout photograph made available by the Belgian Federal Police, April 8, shows Mohamed Abrini who was arrested by Belgian officials. Abrin is a key suspect from last year’s terrorist attacks in Paris. EPA Buy Photo Wait 1 second to continue.

But one group in particular has mobilized to defend that sense of fraternity threatened by the young terrorists. As unlikely as it is diverse, that group is made up of those who survived the Nov. 13 attacks and family members of those who died.

In the year since the attacks, a surprising number of them have published books and made art in response to their grief. While each tells a different personal story, all share the same general message: Hatred is unacceptable.

This message has made Antoine Leiris an instant celebrity in France. His wife, Hélène ­Muyal-Leiris, 35, was killed in the Bataclan concert hall last year, where she had gone to attend the Eagles of Death Metal concert that night. In a Facebook post shortly afterward that went viral, Leiris directly addressed his wife’s killers: “You will not have my hate,” he said.

Those words now form the title of a memoir he has published in France and the United States that appeared last month.

In an interview, he said writing was a means of self-preservation in the midst of a tragedy that not only left him without a wife but also left their 17-month-old son, Melvil, without a mother.

“After the attacks, the moments of writing were moments of escape,” Leiris said. “Words for me are little magnificent things that carry something immense in them. It’s words that permitted me at once to understand reality at the same time as departing it.”

Yet his message was always clear: Any sort of revenge is beside the point. “The only thing that matters is that she’s no longer here,” Leiris writes in his book. “Guns, bullets, violence — all of this is just background noise to the real tragedy now taking place: absence.”

On the street outside the reopened Bataclan music venue, Parisians tell The Washington Post their thoughts on the one-year anniversary of the Islamic State attacks that killed 130 people at a concert, a soccer game and cafes. (The Washington Post)

It might be even more surprising that Fred Dewilde, 50, agrees. Dewilde was inside the Bataclan on Nov. 13, trapped on the floor as the terrorists fired rapidly into the crowd. He responded by writing a graphic novel that details his experience in the siege, trying to help a young woman next to him only to emerge drenched in her blood.

His book, “My Bataclan,” also published last month, is especially firm in its rejection of Islamophobia. France, he wrote, should not use the attack as an excuse to “fall fearful of the scarf, the dark one or the Other.”

[France’s top administrative court overturns burkini ban]

Pressed to elaborate, Dewilde went further, referencing the unlikely rise of the National Front party after the attacks, once considered unthinkable. “France is changing and taking the worst possible policy path,” he said in an emailed statement. “I feel that many Americans must feel that today with the election of [Donald] Trump. A shame of being human. A fear of what France is. A fascist country.”

Finally, there is Danielle Mérian, 78 — “Granny Danielle,” as the French have come to call her. Neither victim nor survivor, she was just a neighborhood resident who insisted on French television after the attack that it was essential to “be friendly to Muslims, who practice their religion freely and kindly.”

Her comment transformed her into something of an unlikely mascot for the Muslim community in the middle of a tense political moment. “It was important to reach out to Muslims,” she said, “because they were the first victims of ISIS.”

The French government’s struggle to implement security improvements in the year since the attacks has coincided with a steady rise in Islamophobia on the right and the left, exacerbated by Europe’s continued migration crisis. The far-right National Front, for instance, has wasted no time in calling Muslims a security threat, while the Socialist government has portrayed them as an affront to France’s secular values. Either way, the implication is the same: France’s largest minority group does not belong.

This is something Mérian will not entertain.

Instead, she has a book of her own, “We Have Not Stopped Loving,” which she sees as something of a modern retelling of Ernest Hemingway’s classic celebration of 1920s Paris, “A Moveable Feast.”

“For me, that was the perfect response,” she said. “In my neighborhood, all the cafes and restaurants are open, and we have begun to live again.”

Mérian reiterated that by “we” she means everyone: “Fraternity,” she said, “is the only solution.”

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