Well, being a former hot head, I can speak as an expert witness .
Anger takes over certain people to the point of no control. I've been there, plenty. Stewart has seen his fair share of incidents where it's clear he has anger management issues. Someone like me or most likely TS, doesn't have the capability to rationalize what is happening in that moment. It's "I see red".
Not saying that's what happened only that people can easily get to a place where all reasonable thought is vanquished.