The Holocaust was cruel and vicious. So was the real Charlotte Salomon who poisoned her grandfather. She admitted to killing him in 2015. This movie's animation is beautiful but it doesn't depict the truth. Art should depict some truth. That is one of it's functions.
EDIT: Charlotte Salomon's letters where she admitted killing her grandfather were released in 2015. Sorry for the confusion.
EDIT: Charlotte Salomon's letters where she admitted killing her grandfather were released in 2015. Sorry for the confusion.