It is quite interesting. Maybe the closest analogue I can think of is South Korea, although there both sides are pro-US and it's really just a question of degree. Could be a function of geopolitical proximity to the United States
It's nothing like South Korea.
Look at the history and demographics of the region:
Slavery was greater and lasted longer in most parts of South America.
Catholics are far far greater in share going back a few centuries more than North America.
The butchering of native americans was also centuries earlier.
Iberia didn't experience the enlightenment.
So you get a society that is far far more racial, catholic, and feudal.
Whites have almost all the property and they tend to guard it against those who don't, both sides will ally anyone who is on their side and fight those who don't.
Even the Catholic Church has been persecuted for siding with the poor.
