One signatory - Matthew Yglesias, co-founder of liberal news analysis website Vox - was rebuked by colleague Emily VanDerWerff, a trans woman, who tweeted that Yglesias signing the letter "makes me feel less safe at Vox".
But VanDerWerff said she did not want Yglesias to be fired or apologise because it would only convince him he was being "martyred".
Clearly somebody was missing the point of the letter 