Actually, no one bought it was self defense in the Zimmerman case, but the stand your ground laws are that broken.

Your statement is completely inaccurate. Zimmerman admitted from the start that he had shot Martin and that this shooting had caused Martin's death. His legal defense was totally based on the claim of self-defense ("stand your ground" wasn't even invoked by Zimmerman since it was utterly-irrelevant to the situation; Zimmerman did not have the power to escape when Martin was standing on him trying to kill him), and the jury found him not guilty of all charges. On what basis do you imagine the jury acted -- "Well, it would normally be bad to kill under these circumstances, but who cares about black people" ...?