Heinrich Heine is one of the greats of German literature. He was born in 1797 in Düsseldorf, an assimilated Jew like his 3rd cousin Karl Marx, with whom he corresponded later in life. The young Heine had no head for business so off he went to college to study law, but there he found literature instead and reconnected with some parts of his Jewish identity.
Heine was particularly interested in the Islamic period of Spain (709-1614), after which both Moors and Jews became victims of the Inquisition. Heine was also deeply disturbed by rising anti-Semitism and the Christian Nationalism that drove it.
In 1821 Heine wrote a play called Almansor in which the characters learn that Christian Reconquistadores have just re-taken Grenada and burned 50,000 books including the Q'uran. Almansor's old servant Hassan utters the now-famous words: Das war ein Vorspiel nur, dort wo man Bücher verbrennt, verbrennt man auch am Ende Menschen.
(That was just a prelude. Where they burn books, in the end they burn people too.)
When the Nazis finally came to power more than a century later, Heine's works were among the first to be banned and burned.
Ironically, Heine couldn't see Nazism coming, but he clearly recognized the threat of Christian Nationalism.