OK I am aware of having totally slipped into 'Someone is wrong on the internet' mode and have said much of what I have to say, and even thought some more about the broader issues of internet debates. I am slipping into 'IsaidyousaidIsaidyousaid' point-scoring mode - never my best side - and I think that it is better for my moral character just to stop right here.
I am also disabling comments.
I have expressed my views and others have expressed theirs and I am just tired and done. I probably won't be on line much for a couple of days - I am speaking in Oxford tomorrow.