Before we condemn the jurors who acquitted George Zimmerman, we should remember that they were asked to do something extraordinary. They were asked to listen to the facts and apply the law to the best of their ability in a case the world was watching.
In our system, we leave questions of fact to a jury. But to render a verdict, a jury must know the law. For this, we rely upon jury instructions. Instructions are supposed to translate the law into lay terms that the jury can apply to the facts as they determine them.