Show me where Kaarma had reason to “fear for his life” and I will support the “Stand your ground” defense. I certainly understand his frustration, but rigging his garage to hold the perp(s) until the police arrive would have been a more reasonable action.
If he had a reasonable fear for his life, and hadn't instigated it, it would be self-defense. "Stand Your Ground" has nothing to do with it. SYG is not a synonym for self-defense.