Agnostic Abe received letters from the Jew Karl Marx (who needs no introduction), one of his biggest supporters of his campaigns from afar. Marx's letters from the International Working Men's Association decried the South as evil and Lincoln was an avid reader of the New-York Tribune where Marx was a frequent writer. The newspaper’s then managing editor, Charles A. Dana, had connections with Karl Marx and was a friend of his.

If anyone has any more information on the "Civil War" or "War of Northern Aggression" or "War Between the States", then share it here. I'd love to learn more.