Complex sentence: In the "Crisis of German Ideology" he traced how what was called the "German Revolution" became anti--Jewish, and in "Towards the Final Solution" (1979) he wrote a history of racism in Europe.
Split into simpler sentences: In the "Crisis of German Ideology" he traced how what was called the "German Revolution" became anti--Jewish. In "Towards the Final Solution" (1979) he sought to write a history of racism in Europe.