They aren't necessarily evil, though a disproportionate number of them certainly are. However, but they ARE mentally ill, by definition. They are frightened, confused, pitiable, vulnerable, miserable people who have internalized one of Current Year's popular social contagions, usually as a result of sexual abuse and/or gaslighting by woke authority figures at the schools they attend. It makes me very sad to ponder them.
https://pubmed.ncbi.nlm.nih.gov/8839957/
The curious might want to look around and maybe even save a copy of that paper before it gets dropped down the Memory Hole. For the impatient, though, the tl;dr is that it's a genunine, no-shit medical paper published in the US by the National Institutes of Health in 1996. "Gender dysphoria," which was not nearly as trendy thirty years ago as it is now, is very effectively curable with an antipsychotic drug called pimozide. "Gender dysphoria" is just another psychotic delusion amenable to treatment with psych meds. Men who show up with a dress and five-o'-clock shadow say "I'm rilly rilly rilly totally a girl, and you have to call me 'ma'am'" are no different from the ones who claim to be Napoleon, or Jesus, or a tree. They merit all the same responses from society. This particular form of psychotic delusion is currently fashionable. I very strongly suspect that, had these same individuals been born a hundred years ago, they would instead have been the Get-Ready Man from various James Thurber stories: an unshaven, bug-eyed, filthy, emaciated man with ratty hair, standing on a streetcorner in Columbus, Ohio, wearing a sandwich board that said "REPENT YE SINNERS" with the R's and N's painted, charmingly, backwards, ringing a bell and screaming "THE WORLLLLLLLLLLLLLD IS COMING TO AN END! GET READY! GET READY! JESUS IS COMING SOON!" for hours on end every day at all passers-by, following some of them into their homes to harangue them. What the Get-Ready man needed, and, quite possibly eventually got, in America in the 1920s, was a meeting with the cops and some muscular orderlies from the local loony bin, who would throw a net over him and drag him away for treatment so that he would no longer be a public nuisance. So it should be with crazy people now.