I sometimes wonder if the the word 'transgender' or 'trans' and rational, fact-based objective thought are like matter and anti-matter, or oil and water, or something.
The knee-jerk accusations of transphobia against JKR, despite the absence of any evidence and the presence of evidence to the contrary is a good example.
The treatment of Sophie Cunningham is another: she has never said anything negative about transpeople either, and has denied any accusations of transphobia, and denied that she has ever taken any political position.
But because the word 'transgender' is involved, the facts don't matter, and a barrage of accusations and abuse appears as if by magic, unconnected to fact or reality.
The appearance of the word 'transgender' also seems to inevitably trigger the automatic release mechanism on a load of clichés including 'culture war' '#bekind' 'toxicity' 'both sides' 'take the heat out of the debate' -
seriously, look at how often those very words appear in statements from people who in other contexts are capable of at least a degree of independent thought and critical analysis.
I'm sure it has happened before in history - witch hunts, 'reds under the bed' scares, religious extremism - but I assume the internet/social media has turbocharged it.