Psychological projection

Psychological projection is a theory in psychology in which humans defend themselves against their own unconscious impulses or qualities (both positive and negative) by denying their existence in themselves while attributing them to others. For example, a person who is habitually rude may constantly accuse other people of being rude. It incorporates blame shifting.

According to some research, the projection of one's unconscious qualities onto others is a common process in everyday life.

A prominent precursor in the formulation of the projection principle was Giambattista Vico. In 1841, Ludwig Feuerbach was the first enlightenment thinker to employ this concept as the basis for a systematic critique of religion. The Babylon Talmud (500 CE) notes the human tendency toward projection and warns against it: "Do not taunt your neighbour with the blemish you yourself have."

Projection (German: Projektion) was conceptualised by Freud in his letters to Wilhelm Fliess, and further refined by Karl Abraham and Anna Freud. Freud considered that, in projection, thoughts, motivations, desires, and feelings that cannot be accepted as one's own are dealt with by being placed in the outside world and attributed to someone else. What the ego repudiates is split off and placed in another.

Freud would later come to believe that projection did not take place arbitrarily, but rather seized on and exaggerated an element that already existed on a small scale in the other person. (The related defence of projective identification differs from projection in that there the other person is expected to become identified with the impulse or desire projected outside, so that the self maintains a connection with what is projected, in contrast to the total repudiation of projection proper.)

...
Wikipedia