When it comes to domestic violence men do not have the option of saying, "I was defending myself against her physical attacks on me."
So it's quite possible that him "putting her outside" was this guy's way of keeping himself safe from further attack and possibly having to go to jail for defending himself.
Not everyman who is physically attack by a woman hits back...non abusive men know that because they are stronger they could do serious damage and again many men are brought up to believe you don't hit a girl/woman for any reason.