Go learn a bit more history - the use of Blackletter/Fraktur was banned by the National Socialist government because it was "Jewish". Earlier Nazi posters and publications used it, but so did the Social Democrats (SPD - Sozialdemokratische Partei Deutschlands) and even Communists (KPD - Kommunistiche Partei Deutschlands) - here are loads of examples, provided by a Social Democratic historical society (Friedrich-Ebert-Stiftung)[0], and a very specific one - the edition of the "Vorwärts" announcing the abdication of the Kaiser (something the SPD was very excited about)[1].

Most older German books and newspapers, regardless of point of view, were typeset in Fraktur.

[0]https://artsandculture.google.com/partner/friedrich-ebert-st...

[1]https://artsandculture.google.com/asset/%E2%80%9Evorw%C3%A4r...

There's a whole site devoted to Weimar Era (1919-1933) era political campaign posters[3], and just about every party, left, right and center, used Fraktur on occasion - and to be fair to the parent commenter, repeatedly by a certain someone complaining about being cancelled[4][5][6]

[3]http://www.wahlplakate-archiv.de/

[4]http://www.wahlplakate-archiv.de/wp-content/uploads/2015/06/...

[5]http://www.wahlplakate-archiv.de/wp-content/uploads/2015/06/...

[6]http://www.wahlplakate-archiv.de/wp-content/uploads/2015/06/...