bad day

Yesterday my husband had a horrible day at work! First of all when he got to the Frito ben, where he loads his chips, his window on the front of the truck was broke out so he could not deliver the chips to his stores. Needless to say the managers at the stores were furious at him of course. He did what he could, he went in and pulled the chips from the back of the stores and filled the shelves to the best of his ability.
Then on his way home he stopped at a gas station to get a drink, and on his way out of the store some guy, that my husband did not know, approached him and proceeded to tell him how worthless his he and his dads family are. My husband said "ok", sarcastically, and continued to walk off and the guy threw a punch at him, he leaned back and the mans hand cought him across the nose. My husband then proceeded to hit this person until he backed off.
I have slight problems with this situation. I don't feel that he should be fighting but i don't feel that he should let the poo kicked out of him either. Yet he has a higher standard to uphold, so Im not for sure how to feel. I guess its not that big of a deal considering that was yesterday and today is a new day.