nobody has that, it's impossible to accurately measure or statistically track attitudes like that
my personal prediction is that this will change absolutely nothing in the long run, things will just keep going as they were before: right wingers are reinforced in their view that nigs are subhuman apes who will chimp for any reason or no reason at all, nigs are reinforced in their view that the police are uniformed klansmen who kill nigs for fun, leftists are reinforced in their view that white people are the devil.
the only real, direct effects of this will be that minneapolis police will probably reduce their policing efforts in nig hoods to a bare minimum. crime will go up, people who want to do honest business will avoid and leave the area at increasing rates. the spiral of urban decay keeps going. the rioters get what they want, and will be worse off for it.