You’re both right.

Nazis had death camps, which are a type of concentration camp.

Concentration camps were what Americans had, when we imprisoned Japanese-American citizens. Apparently, Internment camps are concentration camps for “enemies” and supposedly not meant to imprison a country’s own citizens

It shouldn’t be hard to understand the benefit of this being confusing and who it benefits. It benefits the people that supported these unreasonable and racist actions and those that have profited off such actions economically and socially

Source, though I didn’t read everything