Shades of 1968 and the Days of Rage? Black Lives Matter co-founder Patrisse Cullors has announced that "any opportunity we have to shut down a Republican convention, we will."

Appearing on today's Melissa Harris-Perry show on MSNBC, Cullors also blithely spoke of "the murder of Mike Brown" in Ferguson, MO. Neither of the co-guest hosts sitting in for Harris-Perry, Richard Liu and Janet Mock, challenged Cullors' characterization. This despite the fact that even Eric Holder's Justice Department found no wrongdoing on the part of the police officer who shot Brown.

Question: what would be the effect on the election if Black Lives Matter seriously disrupted the Republican convention?