Psychological projection
Types

A bully may project their own feelings of vulnerability onto the target(s) of the bullying activity. Despite the fact that a bully's typically denigrating activities are aimed at the bully's targets, the true source of such negativity is ultimately almost always found in the bully's own sense of personal insecurity or vulnerability. Such aggressive projections of displaced negative emotions can occur anywhere from the micro-level of interpersonal relationships, all the way up to the macro-level of international politics, or even international armed conflict.
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