[Adam]

You tried to warn him. Even without the hand wave, making that comment immediately after being warned should earn him a T.

If he wants to question that, "Coach, I had just warned you, and you proceeded to question my integrity."

I have no problem with discussing this with a coach in this type of setting as long as he's polite and respectful (I just did it last week when a coach asked why he didn't get a foul call when his shooter jumped into a defender rather than pull up for a last second 10 foot shot trailing by 1), they might learn something. If he continues with the "other officials" garbage, shut the conversation down, "Coach, I answered why I called it, I don't think there's anything else to discuss." Do it all professionally and respectfully, of course.