Well, your press release, the investigating officer, says something different and why the initial confrontation?...What was said that initiated a vulgar discourse? Where were you, why would the fact that a female simply asking a "question" of a man protesting with a sign elevate to such a degree of violence and rage?  

If I were to analyze the situation with the facts alleged, I'd say your family initiated the incident via a confrontational approach and instead of cowering to your family's vulgar nonsense, he stood his ground and was subsequently assaulted for having done so.  

Shame on you and your family for initiating this situation and not respecting the man's "Constitutional Right" to protest.  Perhaps you should assume some of the responsibility for not controlling the females in "your family?"  If they're not prepared for adversity when confronting strangers with their "opinions," perhaps they should mind their own business and keep their mouth shut?  Yes?