[Andy]

If the coach wants to argue judgement, the conversation is over.

After he asks "How was that a foul?" or "Where's the foul?", answer much as you did..."#34 grabbed the shooter's arm, coach."

After that, there will be no more discussion about judgement. Further comments such as "Oh, he did not!" or "He got all ball!" are then basically ignored. If he keeps it up, a simple statement like "I'm not going to discuss judgement with you coach, that's enough" is warranted. You have now issued the warning, allowed him to vent, and we move on. Next step is the T if needed.

As was previously said, you need to keep you emotions in check, we as officials need to rise above the level of the coach. Easy to say, but hard to do.

Keep working on it...communication is a skill that can advance your officiating career.