Why is it that we have never seen a woman instigate a mass murder with assault weapons?

[Chainfire]

10. Einstein speculated, at the beginning of The Great War, that

"A biologically determined, feature of the male character" contributed to war. I believe that the same would apply to murder. The old boy may have been right, he was right about a few other things. As a life long male, who has paid attention, I believe that women have better judgement than men, are more stable, and that it would be a rare woman, indeed, that murdered random children. Women are certainly capable of evil deeds, but not on the same scale as men. Men love fighting, and love war and killing, otherwise we would have abandoned it long ago.