Serial killing and cross dressing seem to go hand and hand, and these people are unhinged.
There are a lot of theories about why this is, but a lot of it has to do with the particular mindset of people drawn to boundary-crossing paraphilias. It's not
just that these men dress up as women, but they derive sexual pleasure from doing so and crossing that social boundary. Eventually, the first crossed boundary starts to lose its thrill as they become desensitized, and they seek out another, more serious boundary to cross. They often become jealous or hateful of women for a number of related reasons (they are female and he will never be, they get to wear women's clothing without getting negative feedback, whatever), which fuels the later violence.
It's the same reason authorities tend to take cases of dedicated peeping toms and panty-thieves so seriously: They tend to be the early signs of an escalating boundary-crossing paraphilia. Men who start out by watching women change or breaking into their homes and stealing their underwear often escalate to raping women, and then eventually to murdering them. They have to cross ever more serious boundaries in order to get the same thrill they initially got from stealing panties... or masturbating in their sister's panties, whichever shoe fits.
Or anyway, that's some of the theory. It's similar to the way studies show that men who watch a lot of porn will eventually become desensitized to "normal" or "vanilla" porn and need ever more violent and graphic pornography in order to get off.
But of course, because we live in a Woke Society(tm), we can't talk about crossdressing fetishes being signs of bad mental health anymore. So these men get to indulge their fetishes
publicly, and engage in even more boundary-crossing behaviors than they used to be socially permitted... wonder what the consequences of that will be.
(Blah blah obligatory disclaimer that not all men with crossdressing fetishes or porn habits will become serial killers or whatever.)
They're angrier at JK Rowling than they are to real life serial killers who used to do it. Just saying.
Of course they are. They're misogynists, the worst thing in the world according to them is a disobedient woman. I'm sure they think the victims of male serial killers were just "asking for it" or "did something to provoke him."