This is one step closer to also normalizing genocide. Where do you draw the line of when it is ok to punish a group of people for something that someone who is

This is one step closer to also normalizing genocide. Where do you draw the line of when it is ok to punish a group of people for something that someone who is vaguely* related to them did? *The use of "family" is a red herring. The point is that a group of people is punished not because of attribution of some charges, but merely because the charged person/group cares enough for them. This can easily be extrapolated to "we will kill all X because we cannot capture the rebels among X".