MR LAX
Mr Dorfling isn't the issue with secondary fire that you distract their fire.  You distract the concentration of their fire at you by giving them another point from which they are being attacked thereby creating a dissolution if you like, a dissolving their fire.  It doesn't mean that you don't shoot at the crowd at all.  So I mean we're talking really fine strategic points of military tactics here and you're expecting this man, who on his evidence so far, hasn't had any military training to understand these fine distinctions.  Really I don't think it's necessaryily that fair.  He's made it clear that he doesn't understand what you mean by secondary fire.  Maybe it wasn't put to him in that basis and maybe that is what you should explore before you pin him down to it.