This seems to have become a favorite pastime of left-wing ideologues - harassing non-leftists in restaurants.
Its the typical progression of leftist ideology. They start with disinformation, work up to harassment, property destruction, and violence, and finally murder people by the millions. The left has certainly been working itself towards that goal over the last decade. During the last presidential election, I saw some Hillary supporters were looking forward to quickly getting to that stage of leftist takeover as soon as she was elected (they posted on forums gloating about it.)