I was brought up to believe that violence towards women was always unacceptable, regardless of any provocation.
you are wrong.
Violence towards anybody is unnacceptable.
The sterotypical and narrow minded view on domestic violence you have makes violence adds to this kind of thing. Woman thinking they can attack men and nothing will happen, or men being too afraid to report such attacks because of fear of ridicule. If it had been a man who went into a bookies, punched someone in the face then got his head kicked in I doubt anybody would be condemming the attacker. But because it's a woman it's all different! What happened to equal rights?
My opinion they should both be charged for assualt!