There is an ongoing debate re. USA about whether today’s serial killers morphed into the mass shooters that make the news so often. But whether that is really a different sort of pathology I’m not sure
I think you're right ParlezVous - it's a different motivation altogether.
I think serial killers seem to like the power of being able to torture (very often), murder, and avoid capture. Seeing their name (whatever "nickname" the press or police give them") in the paper feeds their ego. Many get off on walking past people who are discussing the murders that they've committed. Others like to think "Here I am and you think I'm a really good guy, don't you? If you only knew . . . " and of course for others, its just how they get their sexual kicks - they don't want to get caught, and they don't particularly want anyone to even know that someone is a victim, because that would increase the risk of capture.
The mass murderes are more (I think) people - almost exclusively young men - who feel that everyone is against them and they set out to get revenge and to "show the world" that they are a force to be reckoned with. Again, many relish the though of having their name in the papers - they certainly relish the opportunity to "get back" at all of the people they feel have treated them badly.
The cult of celebrity plays into the egos of both these types of killers, I think. I was watching the "Night Stalker" on Netflix last night, and he loved his nickname - it made him "someone".
I always thinks very sad that the crimes of these people live on, and their names are remembered, while their victims are often forgotten, or perhaps so numerous that their names were never known, or so lost that they have never even been missed.
I can understand people being fascinated with these killers - what makes them tick? How did they evade capture for so long? How were they eventually caught? - I am myself as I think most of us are.
I can't understand the admiration they often stimulate, or why people, and particularly women, want to write to them, get engaged to them, even marry them in prison. Do these women think that they will be the one to "reform" this horrible, damaged individual?
I also think that we live in an era where crimes like this hold so much fascination for many women, and are admired/ envied by so many other men, that many people are just ticking time bombs waiting to be detonated - for an opportunity or an incident to occur which will cause the first explosion.
Fortunately, I also think that most people aren't like that, thank heavens.