It was as much a private property rights case as anything. The gas station where it all started and where Kyle stayed up until they started attacking him, is owned by his grandparents. They came on to his property to attack him.
Since the evidence conclusively proved Kyle to be innocent, not just “not guilty,” this was a vital 2d Amendment case. After all, if the state had railroaded Kyle for legally, properly, courageously, righteously, and morally defending himself from a howling, rabid chimp mob that was trying to burn down all of Kenosha, what person in his/her right mind would ever again want to use a firearm for self defense against a mob.