Certain questions to be answered

Why doesn't Indiana ask Von Stronheim what he was doing during the war?
Why does Indiana let the movie crew tell him his perfectly valid questions were stupid when he was in a prisoner of war camp?
Why does the film crew assume Indiana Jones had access to the script before it was given to him?
Why doesn't Indiana ask Von Stronheim what he was doing during the war he (Indy) killed a bunch of Germans in?