There was a bit of the Old Testament prophet in Karl Marx

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  Karl Marx - " The Eternal Jew " ( translation ). We democratic socialists credit Karl Marx with the first scientific insight into this exploiting, oppressive capitalist system - which now threatens all life on earth.
  
  No doubt those Old Testament prophets were a spiritual influence on the young Marx when he began his erudite investigations. The horrors of the Industrial Revolution haunt Das Kapital.
  
  You can read Erich Fromm on the connection between Marxism and Judaism. Fromm wrote " The Sane Society " , " The Art of Loving " , " The Anatomy of Human Destructiveness ". He described himself as a socialist humanist.
  
   Too many intellectual Jews today - stupefied by Zionism - are not even humanist liberals. We hope to hear from more socialist Jews. I recall the late Harvard professor Howard Zinn - with deep appreciation.