The mouthpiece for Councilman Ydanis Rodriguez (D-Manhattan) is a cop-hating con who served federal prison time for torching an Army recruitment center in The Bronx, The Post has learned.

David Segal, 26, who grew up in leafy Litchfield, Conn., landed the spokesman job last March even after disclosing the arrest to Council Speaker Christine Quinn’s office, which conducts the background checks, sources said.

In January 2005, Segal threw a burning rag into the Parkchester facility — and was carrying a note that described a “wave of violence” targeting military complexes in the Northeast.