Sorry, but Cruz should have simply condemned the protestors. We are supposed to stand together against that kind of crap, not exploit it for cynical political advantage.
All the cynicism is on Donald Trump's side. It is he who cannot control his big mouth and who has exploited race relations and condoned ,even encouraged, violence for cheap political advantage and in doing so has injured the Republican/conservative brand and made it less likely for a Republican candidate to become president.
How dare he risk the fate of the country for his own personal ambition!