Well... she shouldn't have slapped the guy. Not sure why some women believe they have every right to hit a man & not expect them to get angry enough to retaliate with violence. It's a terrible double standard. Treat others as you'd want to get treated.
Don't get me wrong, a man should NEVER hit a woman. Ever. But no woman should feel like she has the right to hit a man because of something that man said. I don't care if we're "weaker" hitting some one is disrespectful in every way.
What happened to that woman is terrible. Nobody should have to go through that type of discrimination, ridicule & violence but it didn't have to get physical in the 1st place.