I don't want to be too specific, and exhibit a person or a club, so I have chosen to modify the facts slightly, to keep the involved parties uninvolved.
I was recently asked to make a banner for a Nordic show event for a certain kind of pet. In this case we will say it was a dog show. One of my suggestions was a dog wearing a viking uniform, as it is a Nordic show and I imagined that Vikings was one of the common denominators.
The club was thrilled, and they used the banner to invite members from multiple Scandinavian countries. I got several positive replies and comments from multiple members saying that they thought the image was really cute!
Some time later, the Swedish delegation protested, saying that they could not publish the invitation banner to their members, because viking helmets with horns were a symbol of right wing extremists and that they represented Nazis.
Initially I thought that this was a joke, but i don't want to judge before knowing if this indeed is the case in Sweden. Do people look at horned viking helmets and think "Nazi" instead of "Viking"?
And yes - this is made with AI. Love it or hate it, it makes for very affordable illustrations for clubs and groups that have no money and make no money
Did people get sentensed for wearing tors hammer?
Nope! The closest is the judgment stated that a hammer reinforced the message of racism that other symbols conveyed. in 2000.
Also, The Chancellor of Justice stated that those familiar with the use of the symbols may associate the clothing with anti-Semitism and racism, but questioned whether the wider public would perceive the clothing as an expression of threat or disdain for a specific group of people. in 2019.
So I guess you could call it a symbol that racist groups tried to take but haven't succeeded.