“It’s a classic, true story.”
There are legitimate doubts about the complete authorship of the story. In particular the New York Supreme Court ordered payment of $50,000 to an author due to plagiarism in the diaries.
https://culturacolectiva.com/history/anne-frank-diary-holocaust-history-hoax/
Don’t get me wrong here. I am very pro-Israel and I’ve known Holocaust survivors. But I prefer the truth over ginned up fairy tales and at least some of Frank’s diary is admittedly fictionalized by Frank herself.
That said, the fact is that it is not an entirely true story.
I did not know that. And in any case several on here have said it is a pornographic version which entirely should be banned from schools.