In my view transphobia is rife on here. Not always explicit but always there subtly. It's interesting how many people deny that certain things were said and yet the linked thread above is a good example of it.
Many posters claim that they aren't against trans men and women, that they are concerned only for preservation of single sex spaces yet then go on to make derogatory comments about neo vaginas (what business is it of yours? Why does it matter to you what surgery another person has? Lots of plastic surgery that people have for medical reasons aren't as perfect as natural body parts - are these people "less than" in your view also or is your spitefulness reserved only for gender reassignment surgery?) or, as in the linked thread, saying that no trans women "pass" - again, so what? These comments aren't about women's safety. They are just spiteful, judgemental comments.
You say that you are just stating the truth when you point out that people can't change sex so therefore trans women are men - well I'd only be stating the truth if I described physical characteristics, so instead of saying the "lady in the red top" I said "the fat lady there" or "the man with the big nose" rather than " the man in the black jumper" and so on. There is no need to point out certain " truths" at all times. We don't always describe actual truths about parentage when talking about children do we? A mum might talk about her child, she wouldn't always say " my adopted child" or "my child born to a surrogate" yet these are truths.
If your concern is safety why not focus only on safety? Why the need to descend into criticising physical appearance?