This is the cortisone rush that tptacek was referring to. You need to let it go through you (or past you) until you feel your mental gears loosen up again. Then step back and look at the bigger picture.
What the editorial author meant was not some kind of absolute freedom from the threat of being shamed or shunned. But that, once upon a time, and it wasn't too long ago, there was a thing known as "civil discourse" in this country. In which (and granted the boundaries are fuzzy hear) -- in itself the mere fact of having an unpopular (or difficult) opinion on the state of the world ... did not run such an alarmingly and dysfunctional risk of getting you shut down in form or another as it does today.
Note that this don't mean "unpopular or difficult" in the anything-goes sense. Spouting sheer idiocy can (and should) get you shunned and shamed, along with threats of implications of violence, and a whole lot of other things I don't need to mention.
But taking unpopular / difficult (or even simply naïve) stances within the boundaries of plausibility and reason, by themselves, should not merit such a reaction. And yet increasingly they do. That is what is meant by a breakdown in the standards of civil discourse. And it this breakdown of standards -- and the creeping climate of "better hold your tongue" that has taken over this country -- that is the main concern of the editorial piece. Not absolutist notions of freedom or freedom-from.
Nuance. That's the key takeaway here.