It’s the same thing as delivery drivers refusing to cross a picket line. You stand in solidarity with fellow striking workers, because their wellbeing is directly related to your own.

It’s collective action and should be praised in an age where opaque corporations and oligarchs run everything.

Completely independent of if you think it is good or bad, it is clear that that the postnord sympathy action is not a strike or walkout.

What is it then?

Simply denying service.

If Starbucks workers go to work all day and serve every customer but Bob, that's not a strike or walkout. Those terms have real definitions.

That doesn't mean it isn't a union activity.

Seems like if the reason for it is within the law regulating worker action, it is, in fact, union activity, and is, in fact, a strike against Bob, according to some Nordic countries.

Is your sole problem with the fact that people are calling something a strike, and you personally don't think they should, according to your possibly single-country-centric view of the term, or is there a substantive objection?

Postnord isn't striking but workers are.