no this letter was dictated to the students by the teacher .. My bet is the students came back from vacation and the teacher asked the kids shared about Disneyland and the teacher went into indoctrination mode and mentioned the jungle cruise and the prince and princes issue she had with Disneyland and then convinced the kids to write the letter.
I have more confidence than you in the ability of leftist to propagandize children and for children to regurgitate it back in well written letters. In past ages, these children would have written very nice imaginative essays about their wonderful visit to Disney. Their teachers have taught them to notice dark skin and gender stereotypes. They are only doing what they were taught. It may or may not have been written by these kids, but smart kids at a school like this could easily have written this letter, so I don’t find any need to dispute this claimed fact for purposes of discussing what the school is doing to these poor children.