You are aware that according to the best theory based on public available evidence Zimmerman didn't shoot Martin until the latter was beating his head on the pavement? Also in that kind of situation "stand your ground" laws aren't all that relevant since there is no way to retreat.
Edit: Also, your "media incompetence" theory doesn't explain why all the mistakes went in the same direction.
By saying "incompetence" you make it sound like I think the media wants to create accurate beliefs about reality, but fails due to other factors. This seems as silly as thinking the human brain evolved to get the right answer, in general, but has all these extraneous biases mucking it up. I thought I explained how I see the media's motives.
I have found this most wonderful (if fairly lengthy) article, and thought you would enjoy having it brought to your attention.
It is so good, I think we should include it among the references in the "Politics is the Mind Killer" wiki page. But, before that, I submit it to you, and ask you: is there anything in this article that would warrant its exclusion from this site? I mean, besides the fact that it is about politics, and written by a notorious Social-democrat (And is that in itself grounds for exclusion?).