destroying one people to save another theme

The following type of ethical dilemma becomes topical: Can the destruction of one people be justified on account of it saving another? In particular, is a people justified in committing genocide if they think it is necessary for their own survival as a people?

3 total · 3 major

StoryLevelMotivation
blackmirror3x05 major We are led to believe that the roaches had to be destroyed to save people, the details are unclear, this may have been true or false even after we learned about the brain implant trickery.
ent3x20 major Should the Xindi, Degra in particular, destroy the human race in order to save the Xindi people?
movie: Starship Troopers: Traitor of Mars (2017) major The viewer is made to ponder whether the Federation should blow its Mars colony to smithereens or stand idly by and allow it to be overrun by bug aliens and used as a stepping stone to conquering Earth.