Not exactly.
1. Motives are involved- aerial bombings conducted in open warfare, without deliberate targeting of civilian targets, is usually considered less morally opposable. I don't think that there are any criticisms of bombings of non-civilian targets. The a-bombs in Japan are considered a special exception.
2. Sorry I used the word "mass killing". I was referring to the sort of death squads, people running around dealing out vigilante "justice", torturing people to death, sort of thing that went around when Pinochet was in power.
"without deliberate targeting of civilian targets"
Oh, puhleeze. Explain how the firebombing or Dresden, Tokyo, and any number of other places, was not. Heck, Hiroshima and Nagasaki were 3rd-rate targets, because LeMay had already firebombed all the 1st- and 2nd-rate ones. The A-bombs were as military in nature as any of the firebombings.
I have a big problem with torturing people to death, and admit I don't know much about to what extent that occured in Chile. I suspect you don't, either. I have no problem with taking out the opposition without a trial in a civil war situation, which is what we're talking about here. I hope we both always live in a society that can afford the luxury of due process and trials for all misdeeds. I don't believe Pinochet did.