It is a justification for killing, a good one in my mind. Murder does not apply when a person has a legal justification for the act, in this case a women is simply exercising her right.

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"The person who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself. " — John Stuart Mill