An incongruity that I didn't notice at the time but realized a bit later is that the prison is called "The Center for Terrorism Confinement" and it has a capacity of 40,000 people. Why would El Salvador or any country need a terrorist detention facility that holds 40,000 people?
According to wikipedia, El Salvador has a population of about 6 million.
The United States famously kept people accused of terrorism charges at Guantanamo Bay, and 780 prisoners have been kept there over the last couple decades since GWB established the prison. There are currently 15.
Presumably there are a lot more people who would fit the description "domestic terrorist" being held in jails in mainland US, but certainly not 40,000 of them.
Presumably president Bukele's administration is using it as a detention facility for regular criminals as well, but it wouldn't be surprising if there's a lot of people there that shouldn't be in jail in the first place.
[1] https://www.cnn.com/2025/03/17/americas/el-salvador-prison-t...