We have a group of 4-6 girls, they are called 'girlfriends'. Mine sometimes interacts with some of t…

We have a group of 4-6 girls, they are called 'girlfriends'. Mine sometimes interacts with some of them, but she's comfortable making friends one-on-one, and she and her bestie are almost always together. The bestie herself isn't against others. We were taking photos of the kids for an album and they were asked to draw commemorative pictures on the board. Everyone went out except my daughter. My daughter was drawing, and so were the others, but then one girl (she's a bit of a troublemaker) started insulting my daughter's drawing. My daughter suggested everyone focus on their own drawing and not interfere with each other, but the other girl pushed her and erased her drawing. My daughter erased hers in response. Then the girlfriends joined in, and the herd mentality kicked in. Even the ones my daughter usually talks to started agreeing with the majority. Although before that, everyone was fine. They didn't let her draw. She came home upset. How should a child act in such a situation? After all, one person can't fight the whole crowd. (I can't use my own experience, I used to handle things harshly) We don't want to confront the other girls' parents.