Shaming and shunning is not harassment, harassment is harassment which requires additional components beyond just shaming and shunning; you have to take it to an excess or compound it with other behavior for shaming and/or shunning to reach anything even remotely resembling harassment.

So decidedly no; you are not granted a freedom from shaming and shunning for your opinion, not in American culture, not in Western or Eastern culture, not historically, not in any religion, nowhere has this concept been held up as a societal more. The concept literally does not exist, and yet here the NYT cites it as some cultural artifact like it's been a cornerstone of American society from the beginning.

And what's provable in a court of law is completely immaterial to this discussion, not sure why you'd bring that up. The NYT was not citing the First Amendment, and in fact directly says so later on in the editorial.