How do you know he is Hispanic?
I don't know. I merely have evidence because newspapers are reporting he is Hispanic.
So an infinite amount more evidence than for police corruption, but still not knowledge.
His skin tone means nothing. A whole lot of Florida Hispanics are quite white, and I have seen more than a few Non-Hispanic whites who Zimmerman's color. More to the point, being Hispanic (or African American for that matter,) certainly does not mean that he could not harbor racist notions about people of color.
It says nothing about whether he holds racist intentions.
It says a lot about whether he's "white" as you and others keep describing him.
He might be a racist - but it appears he isn't a white one.