Calling it "nonviolent communication" is a brilliant marketing move, as it implies that not conversing in this manner is violent. I've seen this style many times in my career, and it always comes off as patronizing. It also tends to be used far more often than recommended. Instead of being deployed in difficult conversations, it gets used in every one-on-one. My guess is that NVC ends up like power posing[1]: pop-psy…
As an example, a quick Google search just now for "nonviolent communication empathy" turns up an article from 2011 at the "Center for Non-Violent Communication" titled "How to DO empathy." I couldn't possibly roll my eyes harder. It's a failed premise from the jump. It's like an ask I recently had at work, "We need to DO machine learning," says the CEO, "because all of our competitors are [putting it on their slide decks]."
I notice the same behaviors in people who read Carnegie's "How to Win Friends and Influence People" and think that it's an instruction manual. It comes off as insincere and it instantly sours me to further communications with the person.