The worst thing that could ever happen to these people is for them to find themselves tainted by association with the right. And so they will fight their corner right until the point that they no longer can. So, for example, you won't get many 'sane' people who would defend Rachel Dolezal's right to self-identify as black, or for a 57-year-old man to self-identity as a baby and sit around in nappies all day.
Which is why this latest move by the Tories gives me hope. I don't think sane people can support it while keeping a straight face. And once the radicals lose the support of the mainstream, their game is up.