Well,I'm not a vegan,but vegetarian,since a teenager. I wonder if veganism is new to her,maybe that is why she is so radical about it. But,she is going about it the wrong way.
But,honestly,I don't care what anyone else has for dinner. And I don't really understand why anyone would care what I had for dinner either. I've educated myself on how to receive the proper nutrition and vitamins.
I have been ridiculed a lot for being a vegetarian,and so I really don't share it with everyone. If someone sincerely asks questions on the topic,I'm happy to share them the info. I read. But,I never bring it up.