The cops got out of the way. More recently I read that the mob looted an open-air market--that's not going to be popular with Mexicans--it's insulting.
I know what you mean - but what's more important in the minds of Mexico's top polticians/elites - a few insignificant peasants and peons getting robbed and assaulted? Or trying to embarrass Trump and promote Mexican/Latino power against the United States?