There's another issue here in relation to distance -- if these are people trying to sneak across Kelly's property, why were they so close to his home? His property is about 1000 yards x 1000 yards, and aerial photos show it's just scrub trees and dirt/grass. His house is in the middle and north of center of that massive area.
IN THAT CONTEXT, here's a group of uninvited trespassers coming across his fence and then heading towards his house and getting within 100 yards of his house when it's all alone in wide open spaces. These are not people on the edge of his property, or on a nearby property, but rather ones who have breached his fences and then come up to his home. There are hundreds of yards in other directions, acres and acres, where they can stay far away AND also be less likely to be seen (if hiding is their goal). Yet they head towards his home? That might feel like a threat, or some sort of looming attack, because why else would they do that?
Yet here, the witness says they came within 10 feet? And the evidence is that Kelly didn't go to them - he was shooting from his porch -- so that means they must have been coming at him, right?