2015
It's easy to react, and it feels justified to do so. Tit for tat and "I'm not going to take this." But de-escalation through the power of words helps get to the truth far faster.
Commenting on the emotions that you are seeing is different than reflecting them back. Talking about what's happening defuses the tantrum that is just waiting to wreck the connection that could be become so valuable.
If the goal is connection, then connect. [Coincidentally, just discovered this book on the topic.]