The ME got destroyed on the stand by the defense, why should I find her credible? Why do you discredit the lead detective and find him not credible? Why is the only eye witness not credible? Do you trust Jeantel? She's lied.
You were not there. There is one eye witness account of the two of them right before the shooting, I do not see any reason for him to lie. He said Zimmerman was on bottom in a struggle (notice I didn't say getting beaten up). This is all we pretty much have to go on. Having said that, who in the are you to say Zimmerman wasn't fearing for his life? Go take a long snack break, I won't be waiting here for your reply. It is obvious to me you feel you were at the scene and now have the power to read Zimmerman's mind.