In "Was Karl Marx a Satanist?", Richard Wurmbrand makes a convincing case that Marx wasn't an atheist at all--he believed in God but rebelled against him. Oulanem, a play Marx wrote in his youth, lays it out pretty well. In his book, Wurmbrant quotes the Soviet paper Vechernaa Moskva:
"We do not fight against believers and not even against clergymen. We fight against God to snatch believers from Him."
Yes, Karl Marx was indeed a satanist. And those who follow him, as well. Unfortunately we have one sitting in the US Senate representing New York. Wonder if it would make any difference to the people of New York to know they had elected an admirer and disciple of satan?