I believe this killing is wrong. It's bad if done by knife or gun, it's worse when done by drone -- striking a home or shop or vehicle, killing unidentified family members and acquaintances as well as (or instead of) the persons targeted.
The USA Death Squads operate from military bases around the world. Other nations and law-abiding peoples should strongly pressure the US government to stop extrajudicial summary killings.
Such murders are cowardly & despicable. Official US Government Death Squads dishonor our nation, our laws, our predecessors, and the legacy of this whole generation. When fighting seemingly evil villains, even Harry Potter characters discuss "we face the choice between what is right, and what is easy." Our use of Death Squads is just plain wrong.
Photos of South American "Disappeared" (supplied by mothers of the dead)