I have followed many threads on this board but never contributed.
In general, I don't express my views on trans issues, mainly due to cowardice.
Today, on a classical literature group on FB, a poster shared a message about JFK. Admiring and quite innocuous. Another poster complained that publicity should not be given to an open transphobe. Against my better judgement, I bit. I asked what specific transphobic things JKR had said.
Cue a barrage of insults. I was called a transphobe, a bigot, etc. An especially vitriolic poster (himself a young white 'cis' man) said that nobody wanted the opinion of a white cis woman. When I retorted that this was hardly an original stance of a man towards a woman with an opinion, he went batshit.
Point of this rant: I was terrified. I am still upset at the level of hatred and irrationality. I totally understand why people are so wary of speaking openly on this subject. It was a valuable and horrible lesson.