I think that was based on Olga's diary. That is the reason that I think Elizabeth was "pro-German". Many people think Germany got a raw deal after WW I and Hitler tore the treaty apart and restore pride to the German people. Even Prince Philip said he think Hitler made things work again Germany, although he personally did not think much about Nazism (he made fun of the salute) until it affected his teacher Kurt Hahn, who had to leave Germany since he was a Jew. When he started Gordonstarn in Scotland, he went with him to the new school. However once people saw Nazism as it really was, many recanted (Including Ex-Kaiser Wilhelm II, who was an early supporter).