“According to Vedic injunctions there are six kinds of aggressors: 1) a poison giver, 2) one who sets fire to the house, 3) one who attacks with deadly weapons, 4) one who plunders riches, 5) one who occupies another’s land, and 6) one who kidnaps a wife. Such aggressors are at once to be killed, and no sin is incurred by killing such aggressors.” (Shrila Prabhupada, Bhagavad-gita, 1.36 Purport)