Let me say right from the start that the entire Trayvon Martin affair is in the hands of the justice system, where it belongs. None of us know exactly what happened. The police can only gather all available evidence and present it to the prosecuting authorities, who must then place it before a grand jury in order to determine whether any charges should be filed, and if so, against whom. That process must take its course. That's what the rule of law is all about.
Nevertheless, I find the media and political witch-hunt directed against the man who fired the shot that killed Mr. Martin to be extremely dangerous. Effectively, the rule of law is being trashed wholesale by a rush to judgment. If this is allowed to proceed, our entire society and culture will be weakened by it. Furthermore, there are aspects to this affair that have been either ignored (by almost all commentators), or mentioned only in passing (by a few of them). For example, see these two articles for a rather different account of what may have transpired:
Fox Tampa breaks silence on Trayvon shooting witness
I have no idea whether those articles are correct: but they provide a very different perspective to the media lynching of Mr. Zimmerman. If they are correct, he's being made into a racial scapegoat - and that would be as intolerable as the racially-motivated murder of an innocent youth.
I guess the moral of the story is to distrust, if not ignore, all the brouhaha until the truth is established. As Robert Heinlein famously said through his most memorable character, Lazarus Long:
What are the facts? Again and again and again - what are the facts? Shun wishful thinking, ignore divine revelation, forget what "the stars foretell", avoid opinion, care not what the neighbors think, never mind the unguessable "verdict of history" - what are the facts, and to how many decimal places? You pilot always into an unknown future; facts are your single clue. Get the facts!