As someone who falls on the Liberal side of the spectrum, this bothers me more than almost anything else regarding modern day politics. If you fall in line with the "right" (left) side, you are allowed to say any number of disparaging, mean, hateful, or ignorant comments without fear of consequence - as long as it's aimed at the political right-wing. If you mention you are a conservative or hold conservative views, you are aligned with the worst of the worst and anything you say is inherently wrong.
The liberal echo chamber is just as bad, if not worse, than the conservative's version of the same thing. I don't think work is ever the correct place to discuss political views in depth, but I can't imagine feeling like I can't express any view without fear of being downright hated.