Whether you think that it's good or bad has no relevance to whether it's true. Without some manner of prepping (which can be localized, like really hating the person in question), humans have a natural aversion to other humans being killed. This is very well known. The military has to deliberately brainwash soldiers into shooting at other people instead of at the air next to them or whatever.
On the flip side, though, we also have a drive to get as close to danger as we can without actually placing ourselves in it. That's part of the appeal of movies. So whether that applies to fiction or even film of somebody being tortured to death or whatever isn't as clear.