I am not a vegan. My social world in D.C./NYC has many secular, left-wing, vegans. Many of them are friends or loved ones. They demonstrably speak their mind in front of me on countless issues on which we disagree.

I have dined with them countless times at restaurants where they order vegan and I don't. I have never once been "snapped at" about my dietary decisions. Some of these people have dedicated years of their life to non-human animal rights activism.

So I am very skeptical that this shaming occurs at any appreciable scale. I suspect it is mostly psychological projection: one doubts the morality of one's decisions, judges oneself harshly, but experiences this as the judgement of others.