A useful idiot is a derogatory term for a person perceived as propagandizing for a cause without fully comprehending the cause’s goals, and who is cynically used by the cause’s leaders.
The term was originally used during the Cold War to describe non-communists regarded as susceptible to communist propaganda and manipulation. The term has often been attributed to Vladimir Lenin, but this attribution is unsubstantiated.
Read More: https://en.m.wikipedia.org/wiki/Useful_idiot
See also: Useful idiot (disambiguation)