Something I don't get is why do the ladies go gaga for a killer whether real or fictional because it boggles the mind someone would go for an overt predator like that.
It doesn't happen with just random killers either. There aren't any ladies going after people like Elliot Rodger or Randy Stair or George Sodini, neither are they going after people like Timothy McVeigh. It's a specific subset of killer, the serial killer, that some women go after, and even then there are some characteristics that they have to have to be able to incite desire.
Altough Ted Bundy is obviously the most prominent example, the best one to analyze is Charles Manson. Manson was a guy that knew his way with words, who, mentally and before the Helter Skelter fiasco, was a little out there but could be talked to, was relatively young, and was also depicted heavily in the media while at the same time maintaining a certain air of mystery.
It's basically the combination of fame (or infamy), relative charisma, and rebellious but undefined nature that creates a middle point between a cult leader, a teenage outlaw, a distant loner and a socialite that makes some women go crazy. It's a semi-blank slate of a pretty and (in)famous guy upon which some women can see what they want see and image what they want to imagine, as well as inventing a fairy tale about how their love turned a monster into a man.
Rodger is out because he was like an open book, he got no girls and thus he wanted to kill everyone, open and shut. Stair had the appeal of watching paint dry, he's out because he was a non-entity when it came to words. Sodini was a lot like Rodger, but he was also old as well as very obscure, as this works by having a small group starting a feedback loop that embillishes the killer and irons out his flaws, like a broken telephone. McVeigh was simply a schizo and a weirdo, that had insane and incomprehensible theories as his driving force.
The stars have to align for a killer to get this treatment, but they do align from time to time, and, just like with an equation, the outcome is always the same