He was in constant contact with mainly Heinrich Himmler and Hermann Göring.
Now comes a new book about Birger Furugård and the first Swedish Nazis by the author Anna-Lena Lodenius, who has long examined violent political movements.
The first Swedish Nazi party was formed not long after the German one.
It was also the first outside the German-speaking world.
The book paints a picture of how it went in the Swedish Nazi movement during the years when Nazism could have become a factor to be reckoned with in Sweden as well.
Here is a description of how Birger Furugård moves from the forests of Värmland to meetings with Hitler, Goebbels and other German Nazi leaders.
He was also called "Deje-Hitler" or - veterinarian as he was - "cod doctor" from the forests of Värmland.
He had his roots in Silbodal in western Värmland, but later lived and worked in Molkom and Deje.
Extensive contacts with NSDAP
The book reveals, among other things, the close and extensive contacts with NSDAP in Germany.
There were German Nazis present at almost every major party event and more or less official reporters who wrote detailed reports read by Adolf Hitler and his office.
In the new book, Anna-Lena Lodenius raises questions about what makes a person become a political extremist and what is required for change, if such is even possible.