OK, it's
actual kidnapping. And it's illegal. Now walk me through this:
1. you are held hostage in a home invasion. You kill a kidnapper. The police won't arrest you (in the Netherlands - maybe other European countries they will, I don't know many details of all EU countries - but this is just for argument's sake anyway). Most likely you will not be convicted of anything (depending on the exact circumstances).
2. you are held hostage during a strike by a union group. They put you in an office, bring you some water maybe, then lock the door (or let's make it more extreme - let's say they tape your hands together, just like the burglar in the scenario above). You wriggle yourself out, take the knife on the side table that is usually used to cut cake for someone's birthday, and when the door opens, you stab the guy on strike in the eye and run out.
What do you think will happen? Will you be charged and/or convicted in this second scenario?
If there is a (in terms of legal repercussions) difference in outcome between the two scenarios, why do you think that is? Would the defense in the court be 'oh but I was actually being held hostage, this was justified self defense'?
(note that I'm not talking about what 'ought to be' here, I'm talking about 'what is'. I'm not interested in arguing hypotheticals based on legicentric fantasy legal theory. Although one might argue what a person in such a case could reasonably expect to happen, which is a real consideration in a legal argument on self defense.)