Remember the way i look at it doesn't make it right... it's still an evil act. It depends on the specifics if there is any underlining good in doing the evil act. If you have to kill 10 people to save a bunch of high school girls they were trying to kidnap to sell on the sex market than i would say the evil act is justified. Unfortunately there are situations where we just have to be evil. It's ultimately interesting to me that almost every human is capable of this evil given the right situation. Some people are even more malleable which isn't a good thing... that's how you get people that strap bombs to themselves to go to heaven... To be honest, i only see religions and cults take evil to another level in the fact that they can justify killing another that, by most standards, is innocent and good. But they have found ways to brainwash people in killing good people by obfuscating the definition of evil... i.e. "none believers are evil." That's one way i meant earlier before i digressed that these groups can make evil worse.
My moral judgments are subjective but i truly think on a personal level they are almost objective... well, never objective but most people would think the three are evil acts. It's just this world that has gone to hell in a hand basket in regards to what counts as evil. I think groups like religions and cults are the biggest contributors to jacking the definition of what counts as evil. I really can't think of too many secular views that aren't cultish that justify killing good people by painting them as evil for not being one of them. In today's age anyways. Maybe Viking days but even then these cults played a factor.