It was about NVC because that was explicitly the subject. It doesn't use NVC (which isn't really applicable to the context), though; the grandparent's reasoning seems to be:

1. kodz4 is advocating NVC

2. kodz4 is being arrogant and condescending;

3. Therefore, NVC makes you arrogant and condescending,

4. And so, finally, you should reject the recommendation to use NVC.