[Some thoughts on "Querdenken" yesterday and today - from the Berlin anti-Semitism controversy in the 19th century to "Querdenken" in the 21st century].

The Berlin anti-Semitism controversy of the 1880s contains numerous elements that have also played a role in connection with the SARS-CoV-2 pandemic and the Querdenken movement. The anti-Semitism controversy is characterized by the spread of false information that has been scientifically refuted. However, this refutation had only a limited effect. This also applies to false narratives on pandemic-related topics that have been and continue to be spread by Querdenkern.