This statement can be seen as very controversial as many people could believe that certain aspects of killing can be justified, however there’s a vast majority of the population who would not believe that killing is acceptable in anyway because it is against the law. Killing is also frowned upon by society as at an early stage of primary socialisation children are taught to deal with anger or pain in a nonviolent manner.
In a typical movie scene and even in reality we would have encounters where killers are sentenced to death for their crime so, we are always aware that killing is never taken as a morally justifiable act. Some Christians would say that killing is always wrong as it breaks one of the Ten Commandments “thou shall not kill” and this would be a sin and seen as immoral. In genesis where God created the family he commanded to Adam and eve to be “fruitful and multiply” suggesting that life is sacred and one’s life should never be taken for any reason as god is imposing that we should keep reproducing not killing. Roman Catholics would also agree that killing is always wrong as life is given to us by God and only god can take it away so killing someone would be committing blasphemy as the killer would be trying to act as God in the same way as Muslims believe that trying to act like God is shirk (a terrible sin). To support the argument, in the bible Job says “The Lord giveth and the Lord taketh away” meaning that only God can create or destroy life no matter what consequences there are. Muslims also believe in the sanctity of life so it would be immoral to kill someone when their life is holy and belongs to God, murder is also forbidden in the Quran so killing someone would be breaking one of the laws from the Quran and this is seen as a sin.
On the other hand, some may disagree with this statement and believe that maybe killing is the right thing to do but in certain scenarios can be justified for example