A man bound by the hands and feet cannot free himself. He must be helped by a person who is unbound because the bound cannot help the bound, the rescuer must be liberated. Therefore, only Lord Krishna or His bona fide representative can release the conditioned soul.
This avatara of the Lord does not kill the miscreants, but delivers them by His causeless mercy.
Vaishnava etiquette is a combination of two words: Vaisnava and Etiquette. Vaishnava means the pure devotee of the Lord and Etiquette means the activity and behaviour of a Vaishnava.
Always think of the Lotus Feet of Lord Krishna and you will find no difficulties in executing the tasks allotted to you by Krishna.