You can attack the messenger, but the message still holds.
http://www.wsj.com/articles/sohrab-ahmari-how-to-fight-the-campus-speech-police-get-a-good-lawyer-1420241639
http://www.wsj.com/articles/brandeis-committed-to-free-speech-letters-to-the-editor-1420488271
Reading President Lawrence’s letter I’m reminded of Hamlet. The lady doth protest too much. You don’t have to write a letter like this in a national publication unless you have a problem.
Dare to argue the wrong position and you’ll be accused of “triggers”. Louis Brandeis would be embarrassed.