My gripe is that it's manipulative rhetoric.
The term "violence" evokes very specific meaning to the average person, physical violence, and describing non-physical actions and concepts as "violence" is an attempt to manipulate people emotionally. If someone told you they were subject to violence at the airport would you really assume anything except physical assault or intimidation?
I have seen countless examples of activists calling speech they don't like "violence", "anti-blackness", or a myriad of other buzzwords — and I am talking about mild disagreements or asking for proof, not anything near hate-speech, bigotry, or promoting violence. It's a deliberate tactic to garner sympathy and support, and I do not like how normalized its use has become.