On Friday, a gunman stormed a pair of mosques in Christchurch, New Zealand, showering worshippers with gunfire, and live streaming the country’s deadliest mass killing since 1943. “I was able to hear the big sound of the shooting,” one survivor, Mohan Ibrahim, told the Canadian broadcaster CBC. Ibrahim fled through the back entrance, with people dropping around him. “Many, many bullets, I’ve never seen anything like that. Later on, we saw the video … he was reloading so many guns.”

Brenton Tarrant, a twenty-eight-year-old Australian national, reportedly claimed responsibility for the slaughter. Police arrested the suspect and three others believed to be linked to the massacre, which by its conclusion had claimed 49 victims.

Soon after emerged an apparent manifesto: seventy-three pages of the same anti-immigrant conspiracy theories and white nationalist talking points that have prompted far-right murderers to spill blood from Charlottesville to Christchurch, from Pittsburgh to Athens. The attack has underlined the internationalism of the ultra-nationalists, the global danger posed by white nationalists and neo-fascists who now feed on one another’s violence, tactics, and ideologies.

The global rise of neo-fascism and white nationalism presents an “enormous threat to the well-being of multicultural society,” Alexander Reid Ross, author of Against the Fascist Creep, told me. “This is just the latest incident in what seems like an increasing tendency of white nationalists to attack civilians in synagogues, mosques, and churches, while attempting to build off one another.”

Tarrant’s manifesto heaped praise on Anders Breivik, the Norwegian mass murderer who slaughtered 77 people in 2011, and American white nationalist Dylann Roof, who gunned down churchgoers in Charleston, South Carolina nearly four years ago. The rambling document included admiration for U.S. President Donald Trump, whom Tarrant celebrated as “a symbol of renewed white identity and common purpose” and declared that “our lands will never be their lands as long as the white man still lives.”