"The way I see it Zimmerman was defending himself a bit too late. Who threw the first punch? Who was the aggressor? Who was defending themselves."
Actually all the just decided was:
“If in your consideration of the issue of self-defense you have a reasonable doubt on the question of whether George Zimmerman was justified in the use of deadly force, you should find George Zimmerman not guilty.” -Jury instructions
The state didn’t prove its case beyond a reasonable doubt. The jury didn’t have to decide who started the fight but rather if the state could prove its side beyond a reasonable doubt.
Had Martin shot and killed Zimmerman I suspect that he would have also been found not guilty as nothing can be proved beyond a reasonable doubt given the nature of the evidence.