This was another point I wanted to look into. I'll go back and watch again but at that moment, sitting there I too thought Emily was talking about Castle Doctrine not 'stand your ground', didn't she even say that, and mention the origin of the term? To say Emily was absolutely wrong and they were absolutely right tends to reveal more about your bias than the confusion of the issues. The fact that all three were (like you) more adamant that she be wrong than the broader issue of general right to self defense, clearly shows they were ganging up to make her look - as you put it 'completely wrong'.
The question at the heart of the discussion is if you were minding your own business, where you were legally ok to be and in possession of a firearm, and you are attacked by a violent criminal and had to defend yourself; would you rather have stronger laws that tend to protect you, or make it easier for you to be prosecuted & be sued by a criminal?
Said another way (rhetorical question): Do you tend to favor the law abiding, or the criminal who instigated the violence?
Castle Doctrine and Stand your Ground are two related but different concepts, they vary greatly from state to state. A lot of people confuse them and most people have been mislead by the media to believe 'stand your ground' was envoked for Zimmermans defense.
All that follows are excerpts From wiki: Zimmerman claimed he was restrained at the time of the shooting and had no option to retreat.[59] Although Zimmerman's defense team did not use the "stand your ground" defense during their trial and instead opted to use "self-defense" as their official defense,[60] Circuit Judge Debra Nelson's instructions to the jury included the statement that he had no duty to retreat as per Florida's stand-your-ground law.[61]
Stand your ground: Forty-six states in the United States have adopted the castle doctrine, that a person has no duty to retreat whatsoever when their home is attacked.[3][4] Twenty-two states go a step further,[5] removing the duty of retreat from other locations outside the home. Such "stand your ground", "Line in the Sand" or "No Duty to Retreat" laws thus state that a person has no duty or other requirement to abandon a place in which he has a right to be, or to give up ground to an assailant. Under such laws, there is no duty to retreat from anywhere the defender may legally be.[6] Other restrictions may still exist; such as when in public, a person must be carrying firearms in a legal manner, whether concealed or openly.
Castle doctrine: "Castle laws" remove the duty to retreat before using deadly force when one is in their home or in some U.S. states just simply where one can legally be.[7]
Stand-your-ground
Main article: Stand-your-ground law
In some states in the United States, one can use deadly force in any location one is legally allowed to be without first attempting to retreat. Such laws remove the requirement that the threat must occur on one's own dwelling.
