This has very little to do with gender identity or anything like that though... It straight up doesn't make sense. People have sex with who they are attracted to (presumably)... There aren't any rules? Like what if the women said "Actually the penis doesn't bother me, it's your arse-ugly face that's a turn off, sorry."
I'm totally open to the idea of sexual fluidity. I'm a straight male but I'd probably suck off a good looking guy out of pure curiosity... I don't find the idea "horrific" or anything but I just happen to be someone who (so far, I guess??

) is only sexually attracted to females.
Err...
I guess my point is, the idea that they are doing something "wrong" by not wanting to have sex with any individual for ANY reason, is just bizarre. As I said I'm straight... Does that mean my 62-year-old female colleague could get me fired for ageism for refusing to bang her?
So yeah. This is more about a nasty individual looking for attention than anything to do with gender identity.
I can't agree that transsexuals aren't "real" transsexuals unless they have or plan to have reassignment surgery. It's not as simple as snippety snip, it's a major medical procedure so - even for people who would "want a vagina" if it was as simple as that - there are other health implications and considerations. Structurally female brains in male bodies (and vice versa) is a real thing. Verifiable. People should have the right to live as they choose and in the way that makes them comfortable without being "forced" into a medical procedure.
However, along the same lines, they certainly don't have the authority or the right to tell other people that they're "not lesbianing properly", or anything else.