Goebbels says to Hippler, that the Fuehrer (Hitler) doesn't like Shakespeare. Actually Hitler loved him, even more than Schiller and Goethe. His favorite plays were Hamlet and Julius Ceasar.
Marians wife is actually called Annemaria Albertine Böck and she died in 1949, three years after Ferdinand Marian.
In the filming scene from "Jew Suess", where Suess is asked not to muss the next mail carriage, the position of the actors in this scene are different from the positions of the characters in the same scene in the original movie. The scene obviously not just a rehearsal recording because the last line in this scene was said by Harlan "Decor change".
In real life Joseph Goebbels didn't attend the premiere of Jew Suess in 1940 in Venice himself. His memories about it in his diary were received by him from a second hand.
During the scene with the Jews there is a Chanukia standing on the table, a Jewish candle-stand with 9 arms, which is used only during Chanukka, a holiday that happens usually in December. THey should have used a Minora. In the next shot there was a correct Minora standing in the background.
In the scene from the New Years Eve 1939, Magda Goebbels is addressing Joseph Goebbels as Paul, but his first name is Joseph. However Goebbels was known as Joseph Goebbels but his full name is Paul Joseph Goebbels.
On Goebbels' New Years Eve Party 1940 there are only 3 children visible (the three blonde children in the front line), while the family had 5 children at the moment. However the youngest of his children, Holdine and Hedda, were almost 3 and 1,5 years old, so it can be assumed that they are in bed already.
At the end of the movie, US soldiers of all races are playing music and dancing at a "beerfest". Segregation in the US army was ended in 1948, two years after the depicted event.
When the Jewish extras are sitting, eating and singing, Fritz Hippler comes in. Deutscher is referencing him as the man, who made the movie "Der ewige Jude" (The eternal Jew). But this movie was published in the year as "Jew Suess" but it was made after Jew Suess was published. However, Deutscher might have seen the man but the name of the movie was unknown at that moment.
In the sex scene between Ferdinand and Anna Marian the song "Il Fait Bon T' Aimer" is played from the phonograph. The song was written in 1944, 4 years after the year the scene is set.
The partisan hymn "Don't say ever you're going the last way" was written in Vilna by Hirsh Glik and performed the first time at the 1. May ceremony in the Ghetto in 1943, celebrating the uprising of Ghetto Warsaw. In this time, Auschwitz was already working
Harlan is seen in 1946 tossing reels of his film on a burning fire. There is no reaction between the flames and the newly added film reels, indicating that the reels were either an inert prop or safety film not used in motion pictures until 1948 or later. Film prints in 1946 would have been on highly flammable nitrocellulose film stock, and no one in the industry would have sat next to a fire to burn them.
In the discussion scene with Harlan, Marian and Krauß. Harlan said that the novel "Jew Suess" was written by Lion Feuchtwanger, as a reference to the base of the script and the plot of the movie. But the script of the movie "Jew Suess" was loosely based on the same-named novel by Wilhelm Hauff, also mentioned by Harlan. Also, according to Harlans biography, he didn't knew the novel. But since a movie version of Feuchtwangers novel was showed in Germany, with false and antisemitic synchronization, perhaps he knew the name of the novel, never read this and wanted to fool the actors to believe, that his "Jew Suess" is not a propaganda movie.
Veit Harlan said, that he would never do a propaganda movie. Actually he already did propaganda movies before "Jud Suess". In 1937 he did "Der Herrscher", that was containing elements from NS-propaganda. Perhaps Harlan said that, to fool the actors to gain them for his movie.
During the filming break Ferdinand Marian points to Fritz Hippler and asks who he is. However he has met him earlier in the movie, e.g. in the Theater and in the test recording.