You can make comedys over hitler and faschism and you can make dramas, that explain how antisemitism and faschism worked and still works. Tarantinos "Inglorious Basterds" is a good example of the first and Hanekes "Das weiße Band" a good example of the second category.

Jojo starts of as an mediocre satire, but as soon as anne frank enters the stage, it becomes a wannabe explanatory children book. it just looks at oversimplified cliche versions of nazis and antisemitism, changes from laughter to crying tears and back to loughter, just for the affect. Nothing more. And this is dangerous, because its downplaying that faschism and antisemitism work in much smarter ways than shown in the film.

It doesnt expose new insights like a really good satire like chaplins big dictator did. its a failed experiment.