It is a defense mechanism against guilt/shame/blame.
It is a kind of reaction formation that leads to anger and rage.
In Freudian psychoanalytic theory, defence mechanisms are psychological strategies brought into play by the unconscious mind to manipulate, deny, or distort reality in order to defend against feelings of anxiety and unacceptable impulses to maintain one's self schema.
When anxiety becomes overwhelming, it is the ego's place to protect the person by employing defence mechanisms. Guilt, embarrassment and shame often accompany anxiety.
The anxiety is felt as an increase in bodily or mental tension and the signal that the organism receives in this way allows it the possibility of taking defensive action regarding the perceived danger.
And there is a certain type of manipulation technique:
Brandishing anger: Manipulator uses anger to brandish sufficient emotional intensity and rage to shock the victim into submission. The manipulator is not actually angry, he or she just puts on an act. He just wants what he wants and gets "angry" when denied.
In conclusion, after all these psychological explanations, if I want to come up with one word for this kind of person, it would be impetuous or impulsive.
of, pertaining to, or characterized by sudden or rash action or emotion.
impetuous, impulsive both refer to persons who are hasty and precipitate in action, or to actions not preceded by thought.
Also from vocabulary.com:
Impetuous has to do with doing things on the spur of the moment — and not good things. Being impetuous usually goes along with being impatient and easily angered.
Best Answer
scandalmonger :
or:
slanderer: