As a German, I've been careful to avoid the term "concentration camp" for El Salvador's #CECOT rent-a-gulag, because the term directly connotes genocide.
But when you threaten to put people in camps under horrific conditions forever, with no due process of recourse (often, as we've seen, on the basis of hearsay or tattoos), those camps become concentration camps. This is nazi talk; this is concentration camp talk. No other term does it justice.
https://www.axios.com/2025/04/09/kristi-noem-migrants-trump-ice-prison