Denmark in World War 2 surrendered in a day. It remained occupied well until the end of the war in May 1945. It surrendered because its armed forces could not realistically resist the Wehrmacht. During the war there was a Danish resistance who among other things helped some thousands of Danish Jews escape to Sweden.
Was it moral for Danish resistance to murder collaborators considering that it would, IMO, not have any impact or have a negative impact on the Danish peoples, and negligible impact on the war?