Someone is "some", I meant in general, but fair point otherwise
In general? In my experience they're in general either privileged and naive or they're in the middle of being radicalized into a hateful political ideology. TBH for years I was always skeptical of the "TERF to nazi" pipeline because it seemed too convenient to assume everyone opposed to trans people existing were on the same side, but I'd personally seen that conversion happen too many times to doubt it. These radfems wind up interacting with hate groups who want to be allied to them and swapping notes.
As to the former group, they're usually sheltered or hadn't even
met anyone with a gender that colors outside the lines before. They believed hook, line and sinker that women are precious and fragile and need to be protected from the scary men who'll damage their pure purity. When in truth it's more like society is built around bad men having opportunities to harm or exploit women, as opposed to it being a property inherent to being a woman. (Trans women, ironically, being just as frequently a target of this infrastructure because it's about power at the end of the day)
To bring this back around -- Mei is definitely acting like the pre-radicalized version and is a good representation for what young TERFs would generally think. She's assuming that Chiaki's existence in a female form is inherently a threat to the women around them. But... how, though? I've seen nothing to suggest so far that Chiaki is the kind of person to assault or even pressure women. And even if her wandering eyes were to be treated as a problem, does she seem the type to disregard being asked not to gawk? So far all evidence is to the contrary -- Chiaki not only has been almost excessively cooperative and doing everything asked of her, she's
been physically assaulted already. By Mei no less.