Outside of the media hype and usual loudmouths I don’t think there is the anger or interest the aforementioned crowd talks about.
Just my .02
“Ya picked the wrong case to advance your narrative!”
I work and associate with a large number of black people. They are pissed about the Zimmerman verdict. Perhaps not pissed enough to waste part of their weekend protesting outside in near hundred degree weather, but pissed enough. When these black causes arise, the overwhelming majority of black people do blindly rally behind their team.