Just wanted to make sure I'm not misunderstanding what you posted above. You're saying that it would be a service to society if the judge had murdered Jesse Watters? You are misusing the term "murdered".
If Watters was trespassing at the residence of the judge, and the judge was asking him to leave, then the idiot Watters should leave, or he has forfeit his existence.
It was unnecessarily polite of the judge to allow him to escape.
You'd best read the laws governing self-defense in whatever state you live in, because there's not a state in America where it would not be murder. But I suspect you know this.