The fact it was a women should have no bearing on the situation.
I kind of disagree on this point. While laws should apply equally to men and women, I would say hitting a woman is
morally worse than hitting a man. If a woman is threatening my life or the lives of innocent people, then sure, I think violence against her would be justified. However, (not to sound sexist) women tend to be a bit more fragile than men
generally. Women tend to not be as strong as men due to biological factors and overall they are less aggressive and confrontational. They are not dainty flowers, but they are certainly more vulnerable then guys. Why do you think rape is such a horrible crime that happens to women much more then men? The average man can overpower the average woman rather easily.
I personally believe women tend to be on average more nuturing and kind than men. You have to admit generally there is an aura of innocence and warmth to them. I think this is why many face to face jobs especially in the service industry seem to be done by women (example - waitresses). It's pretty easy to talk to a woman and they are less intimidating.
So hitting people who are overall seen as more innocent and vulnerable is why I believe most people would never hit a woman unless it was absolutely necessary. I would hit a guy much faster than I would hit a woman.
Just my thoughts on the difference between hitting guys and girls. Also what I say doesn't apply to all women. Some women are horrible people and some are very strong. With some physical training a woman can be ALOT stronger than the average man. For example, I have a sister in the military and she can kick my butt and just about anyone else.