it wouldn't bother me if it was something I can envisage that I could have done at a point.
For instance - my best mate has a conviction for common assault, his ex was violent (I seen it with my own eyes many many times), she used to bite him, slap him, poured scalding hot water on his back - she was a nasty b1 tch - he's not the violent type and for whatever reason didn't want to leave her, but faced with her and the poker for the fire he did what I would have done, he walloped the cow, broke 3 of her teeth, lip and bit of bruising.
Now you tell me - would you employ him?