Hate Is not a UMD Value (but Incivility Apparently Is)

I received a letter from the administration yesterday indicating that incivility is at an all time high among faculty on campus. The administration rightly acknowledged that there is no way to enforce civility...but it strongly encouraged us to be civil (which rather reminds me of Swift's Houyhnhnms).
In any event, later that day, I found myself surrounded by five colleagues who were all bashing conservative thinkers.
I remained silent for the duration. I know when I'm outgunned. Besides, I wouldn't want anyone to think I disapproved of their ideology. It might seem uncivil.