There are a number of different traditions that speak to this. The bottom line is threefold: killing deprives another individual of his Right to Life, killing defies the categorical imperative and would thus make society impossible, and killing destroys the innocence and sanity of the killer. All three of these things are evil.
Yes
Evil people or cats.
The question is phrased as if evil is thought to be tangible thing, it is not. Is a lion eating a wildebeest evil? Is a baboon killing a rival evil? Is a baboon killing a rival good? What is the difference between a group of male chimpanzees killing another chimp from a different group and a platoon of soldiers killing a soldier from a rival army? None. Some people do good things, some do bad things and some do both.
Because their evil deeds is are not impressing at all
One of them was evil, Jew killing dictator. Is that enough?
Difficult, time-consuming, overwhelming, tedious.
Starting to kill means removing bad things . Killing in dreams signify that you evict the evil. Therefore killing in dreams means that you are removing your bad habits.
There is never a reason that would make it OK to ill someone, even if they are evil. Killing people is against the law.
It was not stated as the killing curse in specific, but as murder. It was in a pensive scene with Tom Riddle and Professor Slughorn. It is towards the end of Harry Potter and the Half-Blood Prince. Chapter 23: Horcruxes "By an act of evil - the supreme act of evil. By committing murder. Killing rips the soul apart." -Slughorn
It was awful/criminal/evil/horrible/bad.
you get it by killing green slimes.... slimes are found mostly in swordhaven
well, the story is...she was brainwashed by Wesker into killing Chris and Sheva, but Chris took the thing that was controlling her off her chest and she returned to normal Jill...so in a way, she's evil, but not by her own will