His comment did not assign guilt, he extended sympathy to the family to the loss of their child steps away from his own home. These guys have little problem with how Trayvon appears to have died and the actions of the police because the victim was a black kid.
Some are faulting Zim because he thought something was wrong with a nogger in a hoodie prowling the neighborhood at night.
First of all, profiling is valid.
Second, if we had Zims at the airport gates there would not have been 9/11.