The IT company Mullvad’s founder Daniel Berntsson is behind a giant donation to the populist Örebro Party, which advocates “comprehensive re-immigration” from Sweden. “It’s sad that it’s needed,” he told Flamman.
~ https://www.flamman.se/techprofil-ger-miljoner-till-orebropartiet/


The wiki for the Örebro Party actually describes it as not identifiable as left or right and the founder was actually far left. It also advocates for things like free dental care and anti-corruption. So things aren’t as simple as purely anti-immigration which is very populist in Sweden.
https://en.wikipedia.org/wiki/Örebro_Party
It’s basically orthodox leftism. Leftist governments were historically against immigration because of domestic labor laws. Liberals like to paint anything other than utter globalization “fascist”.
And no, nazis didn’t choose the “national socialism” because they believed in “socialism but national version”, they were anti-communist:
So basically they grifted on the name “socialism” to appease to workers, and redefined it as “national capitalism based on race”.