we all do what we think is right. even killing. everyone should do what they think is the best choice. this includes if you believe in one thing but someone makes you believe in another on pain of death. If you do it, you are still doing what you think is the best available choice. everyone should do what they think is right. so the problem lies not with the mass murderers beliefs, but in the contrast in what we all believe is right. This does not mean that your view is unrelated to the world and what happens. Unless you feel no pain, or are brought up believing it's right, almost no one would believe in killing others for no reason. So, the situation can dictate the views.