After doing some research...
I don't give Jung's theories a lot of weight as a whole, though some points coincide with my own observances.
But your evaluation of the material seems to be off. What I get from my research is that a man that overly identifies with the anima tends towards effeminaty or homosexuality, not brutality. A man who identifies with his masculine persona will repress his anima in himself, and project the image of his anima on the women in his life; these men tend to become disappointed when the women don't match their anima. I see nothing in his discription of the anima of it being destructive, only emotional. In fact he states that the anima is essential in mid life for vitality, flexibility and human kindness.
In general though, what I've read leads me to believe that it is the repression of his anima that would make a man destructive.
