It's quite hard for lesbians (particularly young lesbians, speaking from my own experience) to have these views or these discussions anywhere else without being called bigoted and being told to sit down and shut up. Privately, a lot of the lesbians I have spoken to, even the most liberal minded people, feel uncomfortable with the idea of letting someone with a penis into their sex life regardless of their gender identity. Regardless of whether the trans woman wanted PIV sex or not.
I can't talk about how the trans woman I dated coerced me into having PIV sex and carried on when I had completely frozen and dissociated without people telling me 'not all trans women are like that'. If I point out that she is now living as a man again and I feel completely manipulated and lied to, well, that's not something that ever happens, that's not a good reason to be wary of bepenised people. I'm with Chimamanda Ngozi Adichie: Trans women are trans women. It's okay to be different but equal. Maybe the protesters were too antagonistic, but I can understand why, it sometimes feels that's the only way to be heard.