The hell I can’t! What about in defense of others? The babies he slaughtered were the most innocent of innocent lives. The doctor was cosmically guilty of unspeakable attrocities and deserved worse than he got. That others might have done the same is fallacious as can be — one might attempt to use it to exhonerate or mitigate anything. Monsters need be slain one at a time.
Or in groups.
Ummm, then there a tons of other people we need to get busy and murder - cause there are a lot of evil people out there. Look around you and see how many people are killing and murdering innocents. What if everyone acted as you seem to be advocating? People on this site are really acting nuts.