This is literally you.

1. Reaction Formation (Psychological Term)

In psychology, reaction formation is a defense mechanism where a person hides an instinctual impulse by acting out the exact opposite. If someone has urges they find shameful or ego-dystonic, they may adopt an exaggerated, aggressive stance against those same urges in others to convince themselves (and everyone else) that they don't possess them.

2. Projection

This is the process of displacing one’s own unacceptable feelings or traits onto others. When someone "goes out of their way" to accuse others of the very thing they are hiding, they are projecting their own internal guilt or identity onto a target to externalize the conflict.

3. "The Lady Doth Protest Too Much"

This idiomatic expression (from Shakespeare’s Hamlet) is frequently used to describe someone whose over-the-top, aggressive denial or condemnation of something suggests that the opposite is actually true. The intensity of the hatred is seen as a "tell."

4. Overcompensation

This is a more general term for when an individual goes to extremes to cover up a perceived weakness or a dark secret. By becoming a "crusader" against a specific brand of immorality, they build a public persona that is—in theory—beyond reproach.

5. Moral Grandstanding / Virtue Signaling

In modern social contexts, this is often called weaponized moral grandstanding. The individual uses a high-stakes moral issue as a shield. By being the "loudest voice in the room" against a universally loathed group, they create a social environment where questioning them feels like defending the crime itself.

Summary Table