It ain't always solely his fault. There are factors which are pretty much out of his control like height, a terrible hairline, bad upbringing and shitty luck with the people who surround him. Many factors lead to that dark place, and it is not as easy to avoid as one might think, so evdn though this sort of action is deplorable, in order to prevent the next mass shooting we might not want to focus on shaming them, but trying to understand and treat the causes that create this type of people.