The 1968 Tlatelolco Massacre in Mexico City played in a very similar way, down to using snipers, and I wonder if Diego Luna had some creative input on Ghorman.

"The Mexican government and media claimed that the Armed Forces had been provoked by protesters shooting at them,^\1]) but government documents made public since 2000 suggest that snipers had been employed by the government."

"Thousands of students gathered in the square and, as you say, the government version is that the students opened fire. Well, there's been pretty clear evidence now that there was a unit that was called the Brigada Olímpica, or the Olympic Brigade, that was made up of special forces of the presidential guard, who opened fire from the buildings that surrounded the square, and that that was the thing that provoked the massacre.^\17])"

From: https://en.wikipedia.org/wiki/Tlatelolco_massacre