Is it okay only because the producer is German/Italian?

LOL, if anything, that should make it less ok.

(But I'm also confused about the 'we mustn't write about it but it's okay when professional writers and movie makers do'. I've had the same discussion about RPF (non-Nazi RPF, just regular fic about living celebrities) recently and I don't understand why there would be a difference between writing fic about it and writing books about it.)