Well of course they have to say this stuff, because this is in fact nearly the worst that could have happened.
Politically this is a disaster for them.
It probably means the end of their current project to whip up their base for turnout in 2016.
Now they will have to ditch the Ferguson/Garner thing and find some other race war angle, though this incident may warn them off from that entirely. It should be terribly clear now that this really is playing with fire, and their own side can get burned.
They can’t control their troops, nor can they keep the nuts out. Wiser people would have understood these risks, and how implausible it would be to keep it up for months - or two years! - with no blowback.
Looking on the bright side it may be best that this happened now, barely at the beginning, and not much later, as this campaign could have created a far more bloody incident.
Black Muzzie on Asian and Latino hate crime! Big trouble for the race nuancers.