After having to sit through interminable lectures from Chinese government officials, factory bosses, and party figures while I was in China, I tend to look at this "wolf warrior" phenomenon as the CCP simply extending the way that business is done in China generally to their diplomatic efforts.

No conference or meeting was complete without the most powerful person in the room standing up and issuing a lengthy diatribe, often insulting and filled with glaring prevarications, simply to show that they can and that no one is able to challenge them. It's a power play that you encounter often there and it looks a lot like a Zhao Lijian or Hua Chunying press conference.