Philz - if you've been around this forum long enough you would start to doubt yourself even more if Old School agrees with you...
Let me ask you this about the original post: let's say in your game, instead of the coach coming out and doing his thing, sub A6 has to come in for A1 because A1 twisted their ankle on the play. 24 sec. left, A is down by one. A6 gets the ball, and does an obvious travel, because they hadn't been in the game before this. Does this thought cross your mind: "Maybe I should let this travel go, because all the other A players played their hearts out this game, and it would be a shame to let this one player cost them the game"? I would hope you don't call the game this way. You should call the travel and move on. It is exactly the same with the coach's actions. You make the call, and move on. The coach's actions cost the team the game, not your call. Granted, you felt yourself getting emotional, and it is a good thing to try and keep emotions from getting in the way of the calls. But if the coach crosses the line, it's his fault for costing his players.
I've figured out that if I leave a game wondering if I should've given a "T", then I should have given it. I have never left a game wondering if I should not have issued a T when I have.