let me break it down to you on what will happen
someone insults your wife or gf
you respond with something that will easily get you arrested and depending what you did you might have go to trial/jail etc
regardless of what, the chances of you still being with this girl or wife in 3 years is almost 0, yet the problem you created for yourself and your small penis will linger on for life, and the funniest thing is, that when you get into trouble, as much as you claim you know the person you are with etc, they will dump you and possibly even testify against you.
So as much as you'd like to be superman, id ask you to consider the aftermath.
Prison if full of those who "stood up for themselves" or for others, only a fool will tell you it was worth it.
Living in NY I got to see first hand these dumb fools, they are busy with disrespect that disrespect this, at the end, in jail they are humiliated for years.
My advice, walk away, no girl wife or not is worth one bit of legal trouble over.