I don't personally care about any of the films mentioned, but I guess that's to each their own.
You keep bringing up Adolf Hitler as an example by the way, but when Frank wrote this book, Hitler had already died decades ago and his personality cult was dismantled. Frank still deemed it necessary to warn folks about the dangers of personality cults though, and given by the fact that there have been many more since I don't think that message can ever be said too loudly or clearly.