Blackletter

In the 16th century blackletter symbolised German protestantism and nationalism, in the 1920's it was attacked for being antiquated and was replaced by the new typography which is characterised by sans serif type in asymmetrical compositions. In 1933, the Nazi government revived blackletter  calling it the peoples type and labeled the new typography 'un-German'

Sans serif VS Franktur

Type design was scrutinised during the Nazi reign. In 1932 election posters featuring stark silhouette portraits agains a black background with the name Hitler in sans serif capital letters was seen as modern. During the Weimar Republic blackletter was considered ugly. When Nazis came to power in 1933 Fraktur was the governments semi-official typeface and Antiqua was seen as Jewish type. Some sans serif typefaces such as 'Jack Boot Gothics' were used in part organisations such as the SS magazine. However in 1941 blackletter was band as it was found to have Jewish origins 

http://www.eyemagazine.com/feature/article/the-meanings-of-type