Prosecutors had to prove their case to the jury beyond reasonable doubt. They failed to do that. It doesn't matter whether or not Zimmerman racially profiled Trayvon, it doesn't matter that he disobeyed police orders. All that matters is what happened in that court room. If you know anything about the way societies function then you should know that injustice for one means injustice for us all. Every high profile case like this sets a new legal precedent, that means it establishes a new rule that a court or other judicial body can adopt when deciding future cases under similar circumstances. That alone is a reason for people to be concerned.