The Swedish workers wanted to form a union, because of the poor working conditions. They went on strike and Musk flew in strike breakers, which seems to have upset the whole country, which is now in support of the strikers and boycotting the Tesla factory - post isn’t being delivered, electricians refusing to carry out repairs etc.
Now he lost at court, again (2nd instance), he was trying to force the postal workers to deliver registration plates to the factory, the court sided with the postal workers. He is also trying to sue the government agency responsible for registration plates.
It all started in October, when 130 mechanics working for Tesal tried to get it to sign a labor agreement with them - the agreements usually hold minimum wages for different grades of workers, plus how much they get for each year of service and what benefits they should receive etc.
Since then, the strikes have spread, with workers outside of Tesla joining in, from electricians and postal workers delivering to the factory, to dock workers refusing to handle freight destined for the Tesla factors, to parts suppliers.
The solidarity has also spread to other countries in Scandanavia, such as Norway, Denmark and Finland. It is also not just other unions and workers that are standing behind the mechanics, some pension fund investors have announced that they are dropping all their Tesla holdings in response to how Tesla is handling its worker relations.
Unions in Scandanavia ensure good pay and conditions, even though there are no actual minimum wage laws. In Sweden, a majority of businesses are unionized.
Musk is openly against unions - he called the situation “total madness” on Twitter and has said that unions bring negativity and hostile relationships to the workplace. This might be true in America, but in much of Europe, it brings more harmony and better working conditions, meaning people are happier at work.
(From the Frankfurter Allgemeine Zeitung)