I disagree. If they were to do this then what would set them apart from a French 5th column in Switzerland? I think this would be crossing the line. If they went out and shielded tax resistors and deserters against the police, even in a midst of defensive war that would be commendable. But to object to the military doing something legitimate and worthwhile like resisting an invading foreign power is different.
I think we can judge such questions best if we break down the events into the most basic component actions. A thief is wrong to steal a revolver. But he is still justified in using this stolen revolver to protect himself and his family against a slaver or a murderer. Even if he is lets say also an abusive father.
I would must rather where possible see guerrilla armies fight back against invasions.
I would rather not. In my reading of history guerilla wars can be extremely costly on the civilian population as the guerrillas have no means of protecting them and the occupiers tend to in their frustration resort to brutal repression. If possible it is always better to repel a foreign invasion on your border in a conventional war than to have to fight a guerilla war in your towns and villages.
what would you do in the cases cited by you?
I would hook up with my unit and fight as a regular.
What is your criteria for wars we should reject?
Well the criteria that it is important to have in mind is ‘by the mere act of fighting who are you aggressing against’. I see that you objected to the Falklands War on the grounds that three civilians were killed. But this does not mean that everyone who fought in that war had to kill a civilian. Was it possible for a soldier to go through with it and not aggress against anyone? It was not for the Argentine soldiers because even in the act of fighting this war there was already aggression (against the Falklanders) contained within it. But for a British soldier maybe it was possible (I would say ‘clearly’ but maybe someone will present some info that I do not know about so I am being careful). Sure it was wrong of them to be tax feeders but that is true in peace time also so it is a separate action.