The purpose is to blame, judge and punish. It yields defensiveness and guilt, and has neither fairness or respect in it. Instead of an exchange, it is an attack. Battle lines are drawn and casualties occur. Rather than an encounter between equals, it is a power struggle to establish the superiority of the victor and the inferiority of the defeated.
Someone wins and someone loses.
Righteous indignation rather than respectful exploration characterizes an accusatory attack. Intimacy and clarity are never an outgrowth of such antagonism. In an accusation, attack and blame call forth defensiveness and counter attack. Ridicule, sarcasm and anger are the weapons, and the encounter leaves the embattled participants gloating or guilty. If guilty, then there is shame and punishment to deal with, not accountability and integrity.