Swami Vivekananda Quotes about Killing

Ahimsa (non-killing), truthfulness, purity, mercy, and godliness are always to be kept.
Swami Vivekananda (2015). “The Complete Works of Swami Vivekananda”, p.2649, Manonmani Publishers
There is no such thing as "righteous" anger or justifiable killing.
Swami Vivekananda (2015). “The Complete Works of Swami Vivekananda”, p.3117, Manonmani Publishers