Piers has surely had quite a bit of controversy over the years, so it's interesting that the level of vitriol this time seems to have taken him by surprise.
I think you're right, kittens. I don't think Piers can understand how someone who is as supportive of transwomen as he, could possibly be thought of as bigoted over any of it.
He prefaces soooo many sentences with I'm fully supportive of trans people. It's as though his position is born from a blind acceptance, rather than an actual coherent argument.
And now, he's worried that he will lose every shred of credibility, if he buys into the non-binary nonsense. And requires someone like India Willoughby to uphold his trans credentials, whilst denigrating the non-binary bollocks. (Interesting that India is about the only person who can do this, isn't it?).
When the truth is one's identity is purely a reflection of one's personality. You don't shift from one sex category to another because of it, any more than dyeing your hair a different colour changes you from non binary number 74 to number 96.
I wonder if it will dawn on him.