I had seen the films and even gone several times to watched the "Nutcracker" play (mostly ballet). The Christmas tree were always very large or too big like a giant tree sort of like Redwood tree, I think. It was just a regular play to tell the story about the Nutcracker doll and the dreams that the girl was going through with different characters. The Christmas tree might offend some parents that it has to do with their own religions. It may offend Jewish people but also other religions outside of Jewish tradition. Jewish people don't celebrate Christmas. So that is probably what they are complaining about. If some of the children don't want to go, then they don't have to go. I thought they were given papers to have their parents to sign if they want to go or not. That is the school rule do that for the field trips. That is my opinion.