“It has the makings, the characteristics, of an operation whose purpose or goal is to help these sites become relevant by getting them to be seen as widely as possible,” Mr. Lindholm said.
Over all, more than one in five links were from non-Swedish language sites. English-language sites, along with Norwegian ones, linked the most, nearly a million times. But other European-language far-right sites — Russian but also Czech, Danish, German, Finnish and Polish — were also frequent linkers.
The Times identified 356 domains that linked to all four Swedish sites.
Many are well known in American far-right circles. Among them is the Gatestone Institute, a think tank whose site regularly stokes fears about Muslims in the United States and Europe. Its chairman until last year was John R. Bolton, now Mr. Trump’s national security adviser, and its funders have included Rebekah Mercer, a prominent wealthy Trump supporter.
Other domains that linked to all four Swedish sites included Stormfront, one of the oldest and largest American white supremacist sites; Voice of Europe, a Kremlin-friendly right-wing site; a Russian-language blog called Sweden4Rus.nu; and FreieWelt.net, a site supportive of the AfD in Germany.
This loosely knit global network does not just help increase readership in Sweden; researchers have tracked how Russian state outlets like RT and Sputnik, along with Western platforms like Infowars and Breitbart, have picked up and amplified Swedish immigration-related stories to galvanize xenophobia among their audiences.
Bjorn Palmertz, a disinformation specialist at the Swedish Defense University, said this “information laundry” had resulted in globally viral stories like the one about the Swedish town that allowed a mosque to issue calls to prayer while denying a church’s application to ring its bells — never mind that the church had not applied.
“Sweden is portrayed either as a heaven or a hell,” said Annika Rembe, Sweden’s consul general in New York. “But conservative value-based politicians in Hungary, Poland, the United States and elsewhere would use Sweden as an example of a failed state: If you follow this path, your society will look like Sweden’s.”