I am just one of many artists who have been affected by a new McCarthyism that has taken hold amid a rising climate of intolerance in Germany. Novelist Kamila Shamsie, poet Kae Tempest, musicians Young Fathers and rapper Talib Kwelli, visual artist Walid Raad and the philosopher Achille Mbembe are among the artists, academics, curators and others who have been caught up in a system of political interrogation, blacklisting and exclusion that is...