A neo-Nazi leader who wrote a manifesto called the “Haters Handbook” pleaded guilty in Brooklyn Monday to spearheading a bizarre murder plot to dress as Santa and give poison candy to minority children on New Year’s Eve.

Michael Chkhikvishvili, 22, a citizen of Georgia, ran the Russian and Ukrainian “Maniac Murder Cult” hate group and went by the nickname “Commander Butcher.” He was busted last year for trying to solicit someone who turned out to be an undercover agent into taking part in murder, bombing and arson plots.

On Monday, he pleaded guilty to soliciting violent felonies and distributing bomb-making information. He could get 14 to 17½ years in prison, based on federal guidelines, when he’s sentenced March 9.

The suspect’s group, which goes by the initials MKY, “adheres to a

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