Okay but I'm embarassed about it. So for a summer league, coach is kind of loud & vocal about me "missing the foul". My first mistake was addressing it during a live ball in transition

I ask him where did he get him at?
He says on the hand, didn't you hear it
I say you must not be the HEAD freshman coach... because contact on the hand while a player is shooting is not a foul... while they are holding the ball or dribbling the ball either for that matter. (in a not so calm manner)

He didn't say another word for the whole game, he barely coached his kids. I think I embarassed him in front of his kids & I'm not too proud of that. It was unacceptable to my standards & disrespectful... even though he was out of line & wrong (my pet peeve). But someday he'll be a head varsity or NCAA coach.
I plan to apologize to him when I work there next Wednesday.