When Videla took over the govt in March 1976 it was because the country was in chaos. Isabelita had ascended from VP to the presidency after Juan Peron died in 74. She made Richard Nixon look like the philosopher -king. She was inept and incapable of running a household, much less a country where inflation was running at 50% per month. She turned over control to Lopez Rega. He was Dick Cheney squared to her Georgie Bush. She was subsequently imprisoned for allegedly stealing from a charitable fund - part of the coup intrigue of the military. Lopez Rega hightailed it to Spain.
The people did want change from the inept and oppressive government of Isabelita and Lopez Rega's AAA, but the people did not want a military regime that was even more oppressive than its predecessor. Initially, the junta may have had popular support, but in short order the only ones who supported the military were the temporarily uninformed masses and the rich upper class who were, of course, fearful of any meaningful sociopolitical reform that leftists, progressives, student movements were championing. As soon as the draconian methods of the military became clearer even few of the masses supported them. That's why the La Madres de La Plaza was able to succeed.
Two wrongs do not make a right. I stated no opinion as to whether there were others outside the miltary junta (Monteneros etc) who were equally as evil, or almost as evil, or just a small percentage as evil as the military thugs responsible for the horrors committed in the name of the state. There may have been a number of leftists, progressives who committed kidnappings and violence who also deserve equal punishment, but I suspect that is a more complicated issue about which I have less knowledge. Whatever punishment the leftists/ progressives/ student acivists deserve is independent from the judgment that befits Videla and his cohorts who gave direct orders and/or condoned indiscriminant murder, widespread torture, and the harvesting of newborns. This thread was intended to be about the rotten scum in the military, not others.