The US deportation thugs put their immigration prisoners into solitary confinement (which drives people mad) as the default method for dealing with anyone who is inconvenient. Including those who are mad. Including those who are mad as a result of solitary confinement. Including those who tried to kill themselves to get out of solitary confinement

I suspect the staff do this because they hate immigrants and are eager to hurt them. Here's a report about a thug that vented such hatred many times, and came close to murdering one border-crosser.

It does not follow that all the border thugs are as bad as he is. But they didn't treat his salivating, murderous hatred as a problem, which implies that this hatred is more or less accepted among them.