This is basic military law stuff that goes back more than a hundred years. There's no justification for inventing your own ethics here.

E.g. Article 25 of the 1889 Hague Convention.

> The attack or bombardment of towns, villages, habitations or buildings which are not defended, is prohibited.

I.e. you can attack military targets inside a building, and there can be collateral damage, but you can't bomb a building because it's inhabited by Russian civilians.

Notice how "evil person" or "evil people" is not a legal or relevant concept.

Which takes me to Article 50:

> No general penalty, pecuniary or otherwise, can be inflicted on the population on account of the acts of individuals for which it cannot be regarded as collectively responsible.