In Europe a lot of countries have a system of "Tarifvertrag" ("tarrif contract", but really "collective agreement"). In such contracts the workers union of a section (e.g. metal) do a contract with the business union of the employers. They settle then down to "give 28 days of holidays and x EUR per month to each" ... and then they won't strike. The special thing about this "Tarifvertrag" is now that EVERYBODY benefits from them, union member or not! In Sweden, for example, such general tariffs apply to 90% of the employees. So you can see how normal it's seen there. Anything that fights against this normality is thus seen not favorably (in Denmark it's 80%, in Germany it's much less, just 51%).
Now, Tesla Sweden says that they don't won't to follow such a model, since Eon Musky is, as many US brainwashed business people, is strictly anti-union. Whatever comes from unions is surely coming right from hell :-)
And so in October 130 Tesla employees in various service stations went to strike. Musky didn't bulge. In November 470 employees did strike. Musky still thinking he can work against unions (not with them, like it is custom in Europe, maybe with the exception of France, you can't work with their unions ...). Then workers from other swedish unions said "We don't load/unload for Tesla in Sweden". And now danish and and norwegian workers joined as well.
Currently 12 different unions joined the "make Tesla think a bit more european" strike.