If she thinks it is gross to have a dog in a restaurant, I wonder how she would view me when I had to put my hand into my dogs mouth and remove a sewing needle from him as he had chewed on it (have the scars to prove it). I've said, I would give the dirty mutt mouth to mouth if I had to in order to save his life. There is more bacteria on her pillow, more gross little bugs around in her kitchen than what a dog carries, but of course, she wouldn't understand this.
She has an opinion and I get that some people don't appreciate a dog beside them (was it eating from her dish or something??), of course she may not be swayed by anyone else, but she voiced her opposition in far too passionate a manner. What was achieved by her outburst? She now has her 15 minutes of fame and many who know her and her poor boyfriend now think she has gone off her rocker.
If I were willing to guess, it's a case of ignorance. She probably didn't grow up with dogs or had some bad experiences. It's like gun owners who talk about their ownership. I have never and may never own a weapon like that, but if I were educated and knew the safety procedures, had a history of being around them and respected the ownership obligations, I would have a completed different perspectives. As it were, I don't judge others who own, and I know that people have protected their safety and that of their family with a gun.
In the end I think she went far outside the lines. Stress in her life maybe? Who knows.