Zimmerman didn’t use stand your ground. He had no place he could retreat to.
SYG does not presuppose the existence of a place for the person invoking it to retreat to. Anyway, we don't know for certain if Z could retreat or not once the violence or threat of violence began. As of April 30, O'Mara told the judge that he was keeping Z's options open. Whether Z invokes SYG is for his lawyers to decide, and whether he invokes it successfully is for the courts to decide (and not for third parties such as us to decide). In any case I was using SYG as shorthand more or less for people caught in Z's situation: self defense using a CCW.
Here is one of the larger issues: The Z trial is setting precedents for how CCW carriers who use their weapons are treated by the police and the courts. Are the precedents that are being set favorable towards an ordered society, or not? If not, what additional laws, regulations, or rules might be needed?
It seems that almost all on FR are agreed that barring unforseen testimony or a highly biased judge and/or jury, Z should be found innocent, so discussing that is somewhat moot ('preaching to the converted') here, as well as somewhat boring. JMHO. So go ahead and Keep arguing that Z is innocent if you want to. I am not contradicting you. We are in non-violent agreement on that. But I am primarily concerned with larger implications, so our arguments actually have no intersection point.